Aphasia

Aphasia is a language disorder caused by damage to the parts of the brain that control language, most often from a stroke. It can affect speaking, understanding, reading and writing, but not intelligence.⁠^1,2,3 Speech and language therapy improves everyday communication, and language can keep improving for years (see speech therapy for adults).⁠^1,4 Sudden trouble speaking or understanding is a stroke sign: call 9-1-1.⁠⁵

What is aphasia?

Aphasia is a language disorder that results from damage to the areas of the brain responsible for language, usually from a stroke or a traumatic brain injury; for most people the damage is on the left side of the brain.⁠^1,7 It can affect four things: speaking, understanding what others say, reading and writing. It can affect sign language too.⁠^1,3,7 Aphasia is not a disease in itself but a symptom of damage to the parts of the brain that control language.⁠²

Aphasia affects language, not intelligence: people with aphasia can think, even when they cannot say what they think.⁠^3,6 Language and thinking are separate but overlapping skills, so aphasia by itself does not mean a problem with cognition, though a brain injury can cause both, and the speech-language pathologist (SLP) checks for each.⁠⁷ SLPs diagnose and treat aphasia; speech therapy explains what they do.

How common is aphasia?

Common, and more so with age. The figures each source gives:

• People living with aphasia in the US: 2 to 4 million, by ASHA’s estimate, or about 2 million, the figure NIDCD gives from the National Aphasia Association.⁠^1,7
• New cases: roughly 100,000 to 180,000 people in the US acquire aphasia each year.⁠⁷
• After a stroke: roughly 25% to 50% of strokes result in aphasia (ASHA), or about one third of stroke survivors (NIDCD); after a first ischemic stroke, 15% of people under 65 have aphasia and 43% of those 85 and older.⁠^1,7
• In single studies: 25% of 13,654 acute stroke patients screened for one trial, and 38% of 881 patients on admission to the hospital in another.⁠^15,16

Most people with aphasia are middle-aged or older, but anyone can develop it, including young children.⁠^1,2

What causes aphasia?

Stroke is the leading cause of aphasia, and anything else that damages the brain’s language areas can cause it too.⁠^1,7 Most aphasia comes on suddenly, from a stroke or a brain injury; aphasia from a brain tumor or a progressive brain disease develops slowly.⁠² The causes ASHA, NIDCD and MedlinePlus list:

• Stroke, from a blocked or a ruptured blood vessel in the brain.⁠⁷
• Traumatic brain injury: few figures exist, but the studies ASHA cites found aphasia in 13% to 19% of people with TBI.⁠⁷
• Brain tumors and their treatment: the incidence of aphasia from primary brain tumors ranged from 30% to 50% in the studies ASHA cites.⁠^1,7
• Brain surgery, after which aphasia can appear suddenly.⁠¹
• Infections of the brain, or inflammation.⁠^1,2
• Dementia and other progressive diseases, among them Alzheimer’s disease; when aphasia is the first and main symptom of a dementia it is called primary progressive aphasia.⁠^1,7

Rarely, aphasia follows damage to the right side of the brain, most often in people who are left-handed; in a right-handed person this is called crossed aphasia, and it is rare because most people are left-hemisphere dominant for language.⁠^7,17

What are the types of aphasia?

Aphasia is most often divided into fluent and nonfluent types, by how long a person’s utterances are and how much meaning they carry; within those, the named types describe a typical pattern.⁠^1,7

The types are a guide, not boxes: a person may not fit a single type, and the pattern changes as communication recovers.⁠⁷ MedlinePlus uses a simpler split: expressive aphasia, knowing what you want to say but having trouble saying or writing it; receptive aphasia, which affects reading and understanding speech; global; and anomic.⁠²

What is primary progressive aphasia?

Primary progressive aphasia (PPA) is aphasia that is the first and most noticeable symptom of a dementia, before changes in memory, behavior or movement.⁠¹ It is grouped with the frontotemporal dementias, about 43% of which are PPA, but it can also be caused by Alzheimer’s disease, vascular dementia and Lewy body dementia.⁠^1,7,18 Unlike aphasia after a stroke, PPA worsens over time, and many people with it go on to develop other symptoms of dementia.⁠^1,19 In the US, an estimated 50,000 to 60,000 people live with PPA or the behavioral variant of frontotemporal dementia.⁠²⁰ It has three variants, named for the language problem that appears first:

Anyone with PPA should see a speech-language pathologist, for treatment as well as for diagnosis.⁠¹ Communication in dementia covers the later stages and how care partners can help.

What are the signs and symptoms of aphasia?

The signs depend on the type and severity, but people with aphasia and their families usually notice some of these:

• Trouble finding words (anomia), which almost everyone with aphasia has: knowing what you want to say but not finding the words.⁠^3,7
• Wrong or made-up words: a wrong sound or a wrong word in place of the right one (paraphasias), or new words that listeners do not recognize.⁠^3,7
• Short, halting speech: single words or short phrases with the small words left out, known as telegraphic speech, or words in the wrong order.⁠^3,7
• Repeating the same common words or phrases.⁠³
• Trouble understanding: needing extra time, losing track of long or fast speech, of speech without visual cues, as on the phone or radio, or of figures of speech; directions are confusing, especially when they are quick or have many steps.⁠^3,7
• Not noticing one’s own errors.⁠⁷
• Reading and writing: trouble reading signs, forms, books and screens (alexia) and trouble writing (agraphia), which can occur together or separately.⁠^3,7
• Numbers: telling time, counting money or solving simple math problems.⁠³

In people who speak more than one language, aphasia can affect each language differently, depending on when it was learned, how often it is used and how proficient the person was.⁠^3,7

Is sudden trouble speaking or understanding an emergency?

Yes. Sudden confusion, trouble speaking or difficulty understanding speech is a warning sign of a stroke, and the right response is to call 9-1-1 at once.⁠^3,5

Language problems from a TIA can last a few hours or days and usually do not last beyond that; they still call for the steps above.⁠^1,5 For aphasia that is already known, contact a provider if communication suddenly gets worse or is lost.⁠²²

How is aphasia diagnosed?

The doctor treating a stroke or other brain injury is often the first to notice aphasia, checking briefly how the person follows commands, answers questions, names objects and holds a conversation; most people will also have had a brain scan, such as an MRI or CT, showing where the brain is injured.⁠^1,2 When aphasia is suspected, a speech-language pathologist does the full examination of communication.⁠^1,2

What does the speech-language evaluation involve?

• Screening first: a short check, in the hospital or elsewhere, that shows whether a full assessment is needed; it does not diagnose the type or severity.⁠⁷
• History: the medical history, the languages the person uses, hearing and vision, fatigue, and mood, including anxiety and depression.⁠⁷
• Language, spoken or signed and written, at increasing complexity: understanding words, sentences, paragraphs and stories, naming, repetition, conversation and longer discourse, writing, and gestures.⁠^3,7
• Speech movements, to tell aphasia from apraxia of speech and dysarthria.⁠⁷
• Every language the person uses, with a trained interpreter if the SLP does not speak it.⁠^3,7
• Glasses and hearing aids worn during testing, and testing split into shorter sessions when the person tires.⁠⁷

Which tests measure aphasia?

The trials described on this page measured aphasia with standardized tests: the Western Aphasia Battery-Revised, the Aachen Aphasia Test, the Comprehensive Aphasia Test and the Amsterdam-Nijmegen Everyday Language Test.⁠^8,9,10,15 Hearing loss occurs often after a stroke, so a hearing evaluation can matter too.⁠¹²

How is aphasia told apart from dementia?

By how it starts and how it changes. Most aphasia comes on suddenly, from a stroke or injury, and then tends to improve; primary progressive aphasia is a gradual loss of language, with memory relatively well preserved, that worsens over time.⁠^1,2,20

What is the treatment for aphasia?

Treatment is speech and language therapy with an SLP, tailored to the needs found at assessment and to goals set with the person and their care partners.⁠^3,7 It can be restorative, aimed at improving the impaired language, or compensatory, aimed at working around what does not come back, and is usually both: therapy helps people use the language they still have, restore what they can, and communicate in other ways, with gestures, pictures, notebooks or electronic devices.⁠^1,7 Most people should begin therapy as soon as possible.⁠²

Which aphasia therapy approaches do SLPs use?

ASHA describes many named approaches without endorsing any. The main ones, and what research has tested:

Other approaches ASHA describes include response elaboration training, which builds the number of content words a person uses; gestural facilitation of naming, which uses gestures to help find words; Visual Action Therapy, which trains gestures to stand for objects that are not present; and the Life Participation Approach to Aphasia, which centers treatment on re-engaging in life.⁠⁷

Do medicines or brain stimulation help aphasia?

No medicine cures aphasia.⁠³ A Cochrane review of drug trials, published in 2001, found weak evidence that piracetam improved language scores, together with some concern about a higher risk of death with it, and could not tell whether any drug works better than speech therapy.⁠²⁸ For brain stimulation, a 2019 Cochrane review of 21 trials (421 people) found no evidence that transcranial direct current stimulation (tDCS) improves everyday communication after a stroke, and limited evidence that it helps the naming of nouns; no serious side effects were reported.⁠²⁹ In primary progressive aphasia, tDCS combined with word-finding practice has only preliminary evidence, and there is no high-certainty evidence for any treatment choice.⁠¹⁸

Does speech therapy help aphasia?

Yes. A Cochrane review of 57 randomized trials with 3,002 people found that speech and language therapy improved functional communication, reading, writing and expressive language compared with no therapy.⁠⁴ The benefits were not shown at later follow-up, and therapy did no better on functional communication than social support and stimulation, although more people dropped out of social support.⁠⁴

How much therapy works best?

More therapy, given more intensively, tends to do better. In the Cochrane review, functional communication was better with high-intensity, high-dose or longer therapy, though more people dropped out of the intensive groups.⁠⁴ The RELEASE analysis of 959 people from 25 trials linked the largest gains to more than 20 to 50 hours of therapy in total, 2 to 4 or 9 or more hours a week, on 3 to 5 or more days a week; it found no gains in comprehension with 20 hours or less, and therapy that mixed understanding and expression, was tailored to everyday function and came with home practice did best. Its authors call these exploratory findings.⁠⁸

For long-standing aphasia, the FCET2EC trial at 19 centers in Germany randomized 158 people aged 70 or younger whose aphasia had lasted 6 months or more: 3 weeks of intensive therapy, at least 10 hours a week, improved verbal communication compared with deferring therapy.⁠⁹

Does it matter how early therapy starts?

Extra therapy very early has not added benefit in trials. In VERSE, 246 people began intensive therapy before day 15 after a stroke, 20 sessions of 45 to 60 minutes within four weeks, and did no better at 12 weeks than people given usual care; the authors point out that the trial did not compare therapy with no therapy.⁠¹⁵ In ACT NoW, 170 people with aphasia or dysarthria were randomized within two weeks of a stroke to therapy or to matched social visits, and therapy added nothing beyond everyday communication in the first four months.⁠³⁰ Rehabilitation in general should begin in the hospital as soon as the person is medically stable, ideally within 48 hours of the stroke.⁠³¹

Can therapy still help years after a stroke?

Yes. In Big CACTUS, 278 people a median of 2 years after their stroke practiced on a computer for 20 to 30 minutes a day for 6 months: they got better at finding the personally relevant words they practiced and kept the gain 6 months later, though their conversation did not improve.⁠¹⁰ In COMPARE, people with chronic aphasia gained in word retrieval and everyday communication from 30 hours of therapy over 2 weeks.⁠²³ Gains can fade without practice: about half the word-retrieval gain remained 12 weeks after COMPARE.⁠²³

What does the 2026 stroke rehabilitation guideline say about aphasia?

The American Heart Association and American Stroke Association published a new rehabilitation guideline on August 27, 2026, replacing the 2016 version.⁠^31,32 Its take-home messages for SLPs, written by two members of the writing group: intensive, timely and individualized treatment can help language recover; supported communication training is recommended alongside traditional therapy; AAC is reasonable for severe speech impairment; computerized and group treatment can add to therapy; and telehealth should be considered to widen access.⁠¹² The guideline also says that uncertainty remains about the best approaches, timing and dosing, and that periodic reassessment and a return to therapy help set new goals and prevent decline.⁠³³

What happens in aphasia therapy, session by session?

On Medicare, a course of outpatient therapy runs like this:

Where does aphasia therapy take place?

Treatment usually begins in the hospital or an inpatient rehabilitation unit and can continue in post-acute care; it may be one-on-one, in a group, or in an intensive program, such as an aphasia day program, for a limited time.⁠⁷ It takes place in the languages the person uses, with a bilingual SLP or a trained interpreter.⁠^3,7

How many hours of therapy did the trials give?

How often and how long therapy runs is set for each person.⁠⁷ The trials on this page used:

• FCET2EC: at least 10 hours a week for 3 weeks.⁠⁹
• COMPARE: 3 hours a day, 5 days a week, for 2 weeks (30 hours), in groups of 2 to 4.⁠²³
• VERSE: 20 sessions of 45 to 60 minutes within four weeks, starting before day 15 after the stroke.⁠¹⁵
• Big CACTUS: 20 to 30 minutes of computer practice a day for 6 months.⁠¹⁰
• Group communication treatment: 5 hours a week for 4 months.⁠³⁷

Can AAC help people with aphasia?

Yes. Augmentative and alternative communication (AAC) builds on the language a person still has. For aphasia it ranges from low-tech tools, such as photos, communication books, pointing to letters, pictures or words, and writing or drawing, to high-tech devices and speech-generating apps on phones and tablets.⁠^1,3,7 The 2026 stroke guideline’s messages for SLPs call AAC a reasonable addition to communication for severe speech impairment.⁠¹²

Gestures count as well: some approaches use gestures to help retrieve words, and others train gestures in place of words.⁠⁷ ASHA’s general guidance on AAC is that there are no prerequisites for it, and that using it alongside speech may help natural speech.⁠³⁸ Medicare covers speech-generating devices as durable medical equipment for a severe speech impairment, but not ordinary computers or tablets.⁠³⁹

Does online or computer-based aphasia therapy work?

Online therapy probably works about as well as in-person therapy, though the evidence is limited. A meta-analysis of five studies with 132 people found telerehabilitation for aphasia about as effective as face-to-face therapy, on evidence of low quality, and a Cochrane review of telerehabilitation after stroke found no significant differences from in-person therapy.⁠^40,41

Self-managed computer practice adds to therapy rather than replacing it. In Big CACTUS, daily practice improved finding the words people practiced, but the gains did not spread to words they had not practiced, or to conversation.⁠¹⁰ ASHA notes that SLPs may use computer programs and apps as part of a home program.⁠⁷

ASHA’s standard is that telepractice be of equal quality to in-person care, and you keep the right to ask for in-person sessions; Medicare covers speech therapy by telehealth from home through December 31, 2027.⁠^14,42

How can families help someone with aphasia?

Family members and friends change how well a person with aphasia can communicate. NIDCD’s advice:

• Take part in therapy sessions.⁠¹
• Simplify your language with short, uncomplicated sentences, and repeat words or write down key words when needed, while keeping a natural conversational manner suited to an adult.⁠¹
• Cut distractions, such as a loud radio or TV.⁠¹
• Encourage any kind of communication, whether speech, gesture, pointing or drawing, and avoid correcting the person’s speech.⁠¹
• Allow plenty of time to talk, ask for and value the person’s opinion, especially on family matters, and help them get involved outside the home.⁠¹

What do people with aphasia ask of their listeners?

The advice from ASHA’s consumer affiliate, written in the voice of the person with aphasia, and the American Stroke Association’s tips:

• Get my attention before you start talking, and speak at your usual loudness unless I ask you to speak up.⁠³
• Give me choices instead of open-ended questions, or ask yes-or-no questions, and name the topic before the conversation starts.⁠^3,6
• Give me extra time to find the words, and try not to finish my sentences.⁠³
• Let me do things on my own, and help only when I ask.⁠³

What is communication partner training?

Communication partner training teaches family members and other partners verbal and nonverbal strategies that help the person with aphasia take part in conversation.⁠⁷ A systematic review found that all 25 new studies reported positive changes, and recommended it for the partners of people with chronic aphasia; NIDCD calls it an essential element of a strong therapy program, and the 2026 guideline’s SLP messages recommend supported communication training alongside therapy.⁠^1,11,12 Care partners need education and training for their own well-being too.⁠³³

Do aphasia groups and stroke clubs help?

In a randomized trial of people with chronic aphasia, 24 of whom completed it, 5 hours a week of group communication treatment led by an SLP for 4 months improved communication and language scores compared with no treatment yet, with no decline at follow-up.⁠³⁷ Group treatment also raises the amount of therapy at a lower cost, according to the guideline’s SLP messages.⁠¹² Community aphasia groups, stroke clubs, which exist in most major cities, and activities such as book clubs, choirs and art and drama clubs help people regain confidence.⁠^1,7

Can people with aphasia drive or go back to work?

It depends on the person and the stroke. After a stroke, your health care provider tells you how the stroke affected you and whether and when you can drive; in many areas it is dangerous and even illegal to drive after a stroke without a doctor’s consent, and a driver rehabilitation specialist can test your driving on and off the road.⁠⁴³ The 2026 stroke rehabilitation guideline includes recommendations on safe return to work and driving.⁠³²

At work, people with aphasia may use compensatory techniques, such as a slower rate of speech, typing, writing, drawing or gesturing, and the Job Accommodation Network lists accommodation ideas, including other ways to communicate and AAC devices with telephone access.⁠^44,45 Compared with other stroke survivors, people with aphasia have poorer functional outcomes, and fewer return home or to work.⁠⁸ The ADA has no list of qualifying conditions: a person is covered when an impairment substantially limits a major life activity, or they have a record of one or are regarded as having one.⁠⁴⁵

Does Medicare cover speech therapy for aphasia?

Yes. Medicare Part B covers medically necessary outpatient speech therapy, including therapy to maintain function or slow decline; you pay 20% of the Medicare-approved amount after the deductible, and a doctor, nurse practitioner, clinical nurse specialist or physician assistant certifies the need.⁠¹³ Medicare covers it in each setting:

Medicare has no cap on outpatient therapy, but once physical therapy and speech-language pathology together pass $2,480 in a year (the 2026 amount), each claim must confirm that the therapy is medically necessary, and claims past $3,000 can be picked for review.⁠⁴⁹

Improvement is not required. Medicare covers skilled therapy to maintain function or to prevent or slow decline, not only to restore it, provided the other coverage rules are met; coverage turns on the need for skilled care, not on the potential to improve.⁠⁵⁰ That matters in primary progressive aphasia, which worsens over time and for which NIDCD advises referral to an SLP for treatment, not only for diagnosis.⁠¹ Speech-generating devices are covered separately, as durable medical equipment.⁠³⁹

Medicaid, Marketplace plans and the VA. For adults, speech, hearing and language services are an optional Medicaid benefit, so coverage depends on your state; home health is a mandatory benefit.⁠⁵¹ Every Marketplace plan covers rehabilitative and habilitative services and devices, though the specific services vary with each state’s requirements.⁠⁵² For veterans, audiology and speech pathology are standard medical benefits for every enrolled veteran.⁠⁵³ With any private plan, ask about visit limits, whether a referral is needed, and whether the SLP is in network.

Can you recover from aphasia?

Many people improve a great deal. Language often improves dramatically in the first few months, even without treatment, and some people recover fully; when some aphasia remains after that early period, it is called chronic aphasia.⁠^1,2 Language can keep improving for many years, and people generally recover understanding more fully than speaking.⁠^1,2 Stroke recovery as a whole runs over months to years and does not end when a structured program does.⁠⁵⁴

What predicts recovery from aphasia?

The strongest predictor of long-term recovery is how severe the aphasia is at first, together with where the brain damage is and how large it is; depression after a stroke can slow improvement, and the cause of the injury, the person’s age and health, and access to therapy also play a part.⁠^1,7 In a community-based study of 881 people with acute stroke, 38% had aphasia on admission and 18% at discharge; 95% reached a stable level within 2 weeks if the aphasia was mild, 6 weeks if moderate and 10 weeks if severe, and initial severity was the only clinically relevant predictor.⁠¹⁶ Those figures describe the natural course in the first weeks, measured in 1995; the later trials above show what therapy can add months and years after a stroke.⁠^9,10

In a study of 106 consecutive patients, two thirds of those with aphasia early on still had it 12 months later, and aphasia persists into the chronic phase in about 20% of stroke survivors.⁠^23,55

Is depression common with aphasia?

Yes. A 2025 meta-analysis of 16 studies with 28,288 people found depression in 31.7% of people with aphasia after a stroke, with large differences between studies.⁠⁵⁶ Depression and anxiety are very common after any stroke, and people should be screened early, screened again later, and treated when needed.⁠^33,54 Counseling may help with the depression or frustration many people with speech impairment feel.⁠²²

Aphasia vs dysarthria vs apraxia of speech: what is the difference?

Aphasia is a language disorder; dysarthria and apraxia of speech are speech disorders, and the three can occur together. ASHA’s comparison:⁠^22,57

Rhythm and stress problems, and groping for mouth positions, can occur in both apraxia of speech and aphasia, though they may look different, and severe aphasia can hide apraxia of speech.⁠⁵⁷ An estimated 44% of people with chronic aphasia have some degree of apraxia of speech.⁠⁵⁷ Acquired apraxia of speech in adults is separate from childhood apraxia of speech, a distinct disorder.⁠⁵⁷

What other conditions come with aphasia?

After a stroke, problems often come together: in one study of 221 people after a first ischemic stroke, 44% had dysphagia, 42% dysarthria and 30% aphasia.⁠⁵⁸ Cognitive-communication disorders, problems with attention, memory or reasoning that affect communication, can occur alongside aphasia and are assessed separately.⁠⁷ Damage to the right side of the brain usually leaves word retrieval and grammar intact, so it rarely causes aphasia.⁠¹⁷

Other speech, voice and swallowing problems in adults have their own causes and treatment: voice disorders, stuttering in adults, and the changes in speech, swallowing and communication that come with Parkinson’s disease, multiple sclerosis, ALS and dementia.

What are the common myths about aphasia?

• Myth: aphasia means lower intelligence. Aphasia does not affect intelligence or how a person thinks; people with aphasia can think, even when they cannot say what they think.⁠^3,6
• Myth: recovery stops after six months. Language can keep improving for many years, and 3 weeks of intensive therapy improved communication in people whose aphasia had lasted 6 months or more.⁠^1,9
• Myth: speaking louder helps. People with aphasia ask listeners to speak at their usual loudness unless asked otherwise; extra time, choices and fewer distractions help more.⁠^1,3
• Myth: a pill or brain stimulation can cure aphasia. No medicine cures it, and brain stimulation has not been shown to improve everyday communication.⁠^3,29
• Myth: using a communication board or app means giving up on speech. AAC builds on the language a person still has, and ASHA’s general guidance is that it may help natural speech when used alongside it.⁠^7,38

How do you find a speech therapist for aphasia near you?

Look for a licensed speech-language pathologist who treats adults with neurological conditions, and ask how much of their work is with aphasia. ASHA’s specialty certification boards cover AAC, child language, fluency and swallowing, not aphasia, and specialty certification is not required to practice in any area.⁠⁵⁹

The DrSensory speech therapy directory lists practices by state and city. On a city page, set Care for to Adults and Specialty to Neuro (stroke, TBI, Parkinson’s). A specialty tag comes from the practice’s own description of its services, not from a credential, so ask about their experience with aphasia and with intensive or group programs when you call.

Every SLP needs a state license. ASHA’s Certificate of Clinical Competence (CCC-SLP) is a national credential whose holders have met standards that typically go beyond state licensure, and anyone can check an SLP’s certification on ASHA’s site.⁠^60,61

What should you ask before you book?

• How many adults with aphasia have you treated, and after which causes?
• How many hours a week can you offer, and do you run an intensive or group program?
• Will you train my family in communication strategies, and can they join sessions?
• Can therapy be in my language, or with an interpreter?
• Do you offer telehealth or home visits, and do you take Medicare or my plan?

Telehealth widens access to specialized SLP care, and you keep the right to ask for in-person sessions; if leaving home is hard, Medicare home health covers speech therapy at home for people who are homebound.⁠^12,42,46 In-home therapy explains how home visits work.

Sources

1. National Institute on Deafness and Other Communication Disorders. Aphasia. NIH Pub. No. 97-4257, last updated April 16, 2025. “Aphasia is a disorder that results from damage (usually from a stroke or traumatic brain injury) to areas of the brain that are responsible for language”; “For most people, areas in the left side of the brain are affected”; “Aphasia impairs the expression and understanding of language, as well as reading and writing”. “About 2 million people in the United States are living with aphasia, according to the National Aphasia Association”; “Stroke is the leading cause of aphasia. According to the National Aphasia Association, approximately one third of stroke survivors have aphasia”; “Most people who have aphasia are middle-aged or older, but anyone can develop it, including young children”. “Aphasia can appear suddenly, following brain surgery or after a head injury, or it can develop gradually from the effects of a brain tumor (and associated treatments). Other causes of aphasia include brain infections”; “People with progressive neurological disorders, such as Alzheimer’s disease or another form of dementia, may also develop aphasia”. Types: “Most often, aphasia is divided into two broad categories: fluent and nonfluent”; in Wernicke’s aphasia people “may speak fluently in long, complete sentences that have little meaning, adding unnecessary words and even making up words”, are “often unaware of their spoken mistakes”, and have “difficulty understanding language, whether spoken, written, or signed”; “People with Broca’s aphasia frequently speak in short phrases produced with great effort”, “may also have right-sided weakness or paralysis of the arm and leg”, “are usually aware of their speaking difficulties and can become easily frustrated”, and “Broca’s aphasia may co-occur with apraxia of speech”; “global aphasia results from damage to extensive portions of the language areas of the brain”; “People with global aphasia have severe communication difficulties and may be extremely limited in their ability to produce and comprehend language”; “Conduction aphasia is a fluent aphasia in which a person has difficulty repeating words and simple phrases”; “Other subtypes include transcortical aphasia (motor, sensory, or mixed), anomic aphasia, very mild or latent aphasia, and mixed or unspecified presentations of aphasia”. “In some cases, aphasia will be the first and most noticeable symptom of dementia, rather than memory, behavioral, or movement changes. This is called primary progressive aphasia, or PPA”; “PPA can be caused by different types of dementia, such as Alzheimer’s disease, vascular dementia, Lewy Body dementia, and frontotemporal dementia”; “PPA worsens over time, causing the person to eventually lose their ability to use language”; “referrals to speech-language pathologists for people with PPA should always be made, not only for assistance with diagnosis but also for treatment”. After a TIA, “Language abilities may be affected for a few hours or days after a TIA but are usually not permanently affected”. Diagnosis: “The doctor who treats a person for a brain injury, such as a stroke, may be the first to identify aphasia”; “Most individuals with suspected aphasia or PPA will have undergone a diagnostic scan that may confirm the presence and location of brain injury or brain degeneration”; “A doctor may also briefly test the person’s ability to understand and produce language, assessing the ability to follow commands, answer questions, name objects, and carry on a conversation”; “If the doctor suspects aphasia or PPA, the patient should be referred to a speech-language pathologist for a comprehensive examination of the person’s communication abilities”. Treatment: “Aphasia therapy aims to improve the ability to communicate by helping individuals use their remaining language abilities, restore language abilities as much as possible, and learn other ways of communicating, such as through gestures, pictures, notebooks, and/or electronic devices”; “A strong therapy program will include communication partner training as an essential element”; “Speech-generating applications on mobile devices such as cell phones and tablets can provide alternative ways to communicate”; “Virtual meetings with speech-language pathologists provide patients with the flexibility and convenience of receiving therapy in their homes through a computer”. For families: “Participate in therapy sessions”; “Simplify language by using short, uncomplicated sentences”; “Repeat words or write down key words to clarify meaning as needed”; “Maintain a natural conversational manner appropriate for an adult”; “Minimize distractions, such as loud radio or TV”; “Ask for and value the opinion of the person with aphasia, especially regarding family matters”; “Encourage any type of communication, whether it is speech, gesture, pointing, or drawing”; “Avoid correcting the person’s speech”; “Allow the person plenty of time to talk”; “Help the person become involved outside the home”; “Stroke clubs (regional support groups formed by people who have had a stroke) are available in most major cities”; “Participating in activities such as book clubs, technology groups, choirs, and art and drama clubs can help people with aphasia regain their confidence and social self-esteem”. Recovery: “people with aphasia can often experience dramatic improvements in their language and communication abilities in the first few months, even without treatment”; “But in many cases, some aphasia remains following this initial recovery period. This condition is called chronic aphasia”; “Research has shown that language and communication abilities can continue to improve for many years after the brain injury”; “Factors that may influence the amount of improvement include the cause of the brain injury, the area of the brain that was damaged and the extent of the damage, the age and health of the individual, and access to therapy”; “Aphasia may co-occur with speech disorders such as dysarthria or apraxia of speech”. Checked October 7, 2026.
2. MedlinePlus, National Library of Medicine. Aphasia. “Aphasia is not a disease. It’s a symptom of damage to the parts of the brain that control language”; stroke “is the most common cause of aphasia”; “Most aphasia happens suddenly from a stroke or brain injury. Aphasia from a brain tumor or other brain disorder may develop slowly over time”; causes include “Brain infection or inflammation” and “Other brain disorders or neurologic diseases that affect the brain and get worse over time, such as dementia”; “Anyone can have aphasia at any age, but most people with aphasia are middle-aged or older”. “There are four main types of aphasia”: “Expressive aphasia is when you know what you want to say, but you have trouble saying or writing your thoughts”; “Receptive aphasia affects your ability to read and understand speech”; “Global aphasia is the loss of almost all language ability”; “Anomic or amnesia aphasia is when you have trouble using the right words for certain things, people, places or events”. Providers “Order an imaging scan to see if there’s a brain injury and what part of the brain is damaged”, such as an MRI or CT scan; “In most cases, the tests are done by a speech-language pathologist or speech therapist”. Therapy “may include exercises in reading, writing, following directions, and repeating what the therapist says”; “Treatment may be one-on-one with a speech therapist or in a group. Therapy using a computer may also be helpful”; “Therapy may also include learning how to communicate with gestures, pictures, smartphones, or other electronic devices”. “There’s no cure, but treatment may help improve language skills”; “Some people fully recover from aphasia without treatment. But most people should begin speech-language therapy to treat aphasia as soon as possible”; “Language abilities may continue to improve over many years. In general, people recover their ability to understand language more fully than their ability to speak”. Checked October 7, 2026.
3. Communication Health Support Association (the consumer affiliate of the American Speech-Language-Hearing Association). Aphasia. “Aphasia often happens after a stroke that damages parts of the brain that control language”; “Aphasia does not affect your intelligence or how you think”; it “can affect how you speak, understand others, read, write, and even use sign language”. Signs include “You know what you want to say, but you can’t find the words”, “You make up new words that others don’t recognize”, “You find it easier to say single words rather than full sentences”, “You repeat common words or phrases”, directions that “are confusing — especially when they are given quickly or have many steps”, “Reading signs, forms, books, and screens” and “Using numbers — for example, telling time, counting money, or solving simple math problems”; “If you speak more than one language, aphasia may affect each language differently”. “If your speech or communication changes suddenly, call 911 right away”. The SLP will “assess how you understand words, questions, directions, and stories”; “If you use more than one language, your SLP will check how you communicate in each language”; “Your SLP will work with you to set goals that meet your needs and fit into your life”; “You may meet with an SLP one-on-one or in a small group”; “If your SLP doesn’t speak your language, they can work with a trained interpreter”. Other ways to communicate include “pointing to letters, pictures, or words”, “using a phone, tablet, or communication device” and “writing or drawing”. “There’s no medicine that can cure aphasia, but SLPs can help you find ways to communicate”. Tips for listeners, in the voice of the person with aphasia: “Get my attention before you start talking”; “You don’t need to speak louder than usual unless I ask you to”; “Give me choices instead of asking open-ended questions”; “Give me extra time. I might need a moment to find the right words”; “Try not to finish my sentences”; “Let me do things on my own. I may need a few tries. Help me only when I ask for it”. Checked October 7, 2026.
4. Brady MC, Kelly H, Godwin J, Enderby P, Campbell P. Speech and language therapy for aphasia following stroke. Cochrane Database of Systematic Reviews. 2016;(6):CD000425. doi:10.1002/14651858.CD000425.pub4 (PMID 27245310). “We included 57 RCTs (74 randomised comparisons) involving 3002 participants”; “Our review provides evidence of the effectiveness of SLT for people with aphasia following stroke in terms of improved functional communication, reading, writing, and expressive language compared with no therapy”, though “benefits were not evident at follow-up”. “Nine randomised comparisons (447 participants) assessed SLT with social support and stimulation; meta-analyses found no evidence of a difference in functional communication, but more participants withdrew from social support interventions than SLT”. “Functional communication was significantly better in people with aphasia that received therapy at a high intensity, high dose, or over a long duration”, but “The benefits of a high intensity or a high dose of SLT were confounded by a significantly higher dropout rate in these intervention groups”.
5. Centers for Disease Control and Prevention. Signs and symptoms of stroke (May 19, 2026). Signs include “Sudden confusion, trouble speaking, or difficulty understanding speech”; “Call 9-1-1 right away if you or someone else has any of these symptoms”; in the B.E. F.A.S.T. test for speech, “Ask the person to repeat a simple phrase. Is the speech slurred or strange?”; “The stroke treatments that work best are available only if the stroke is recognized and diagnosed within 3 hours of the first symptoms”; “Note the time when any symptoms first appear”; “Do not drive to the hospital or let someone else drive you”; a TIA “is a sign of a serious condition that will not go away without medical help”, so “tell a health care team about the symptoms right away.” Checked October 7, 2026.
6. American Stroke Association. Types of Aphasia (last reviewed April 14, 2024). “Some people mistakenly think those with aphasia aren’t as smart as they used to be. But they can think; they just can’t say what they think”; in Wernicke’s aphasia people “String together words that sound like a sentence but don’t make sense”; communication tips include “Asking yes/no questions” and “Establishing a topic before beginning a conversation”. Checked October 7, 2026.
7. American Speech-Language-Hearing Association. Aphasia (Practice Portal). “Aphasia is an acquired neurogenic language disorder resulting from an injury to the brain, typically the left hemisphere, that affects the functioning of core elements of the language network”; it “involves varying degrees of impairment in four primary areas”, spoken and written expression and spoken and reading comprehension. “Language and cognition are separate but overlapping skills”; “the presence of aphasia does not imply cognitive deficits”. “Aphasia can occur because of traumatic brain injury (TBI), brain tumor, infection, dementia, or other neurodegenerative diseases. However, it is most commonly seen in individuals post-stroke”, ischemic (from a blockage) or hemorrhagic (from a ruptured blood vessel); “roughly 100,000–180,000 people acquire aphasia each year in the United States”; “2–4 million people in the United States are living with aphasia”; “roughly 25%–50% of all strokes result in aphasia”; “Fifteen percent of individuals under the age of 65 years experience aphasia after their first ischemic stroke. This percentage increases to 43% for individuals 85 years of age and older”. “Very few statistics are available regarding the incidence and prevalence of TBI-induced aphasia”; “aphasia occurred in 13%–19% of individuals with TBI”; “the incidence of aphasia as a result of primary brain tumors ranged from 30% to 50%”. “in rare instances, aphasia can occur with a right-hemisphere lesion. This happens most often in people who are left-handed”; “When a right-hemisphere lesion causes aphasia in someone who is right-handed, this is referred to as crossed aphasia”. Types: “Clinicians should be aware that a person’s presentation may not fit into a single aphasia type or subtype”; “Aphasia’s presentation may also change over time as communication improves with recovery”; “primary progressive aphasia is a subtype of frontotemporal dementia in which language capabilities become progressively impaired”. Signs: anomia, “difficulty retrieving words, is essentially universal across all individuals with aphasia”; sound and word substitutions (“These are known as phonemic paraphasias”, “These are known as semantic paraphasias”); “creating novel words that are not meaningful or recognizable to the listener”; “This is known as telegraphic speech”; “speaking haltingly or with effort”; “making syntax errors, such as putting words in the wrong order”; “requiring extra time to understand spoken messages”; “having difficulty understanding long or rapidly presented speech”; “having difficulty understanding spoken language without supporting visual information (e.g., telephone, radio)”; “having difficulty interpreting nonliteral language”; “lacking awareness of errors”; “Alexia is the term for reading comprehension difficulties, and agraphia is the term used for written expression difficulties. Alexia and agraphia can occur together or in isolation”; “individuals who speak more than one language may be affected by aphasia in different ways depending on when the language was learned, how often each language is used, and the overall degree of proficiency in each language”. Assessment: “Speech-language pathologists (SLPs) play a central role in the screening, assessment, diagnosis, and treatment of persons with aphasia”; “Screening is a procedure for identifying the need for further assessment and does not provide a detailed description of the diagnosis, severity, and characteristics of aphasia”; “Facilitate a differential diagnosis of apraxia and dysarthria through an assessment of articulatory processes”; “Assess expressive and receptive skills in spoken/signed and written language of increasing complexity across a variety of contexts”, including comprehension of words, sentences and paragraphs, naming, repetition, spontaneous speech, discourse, writing and gestures; “endurance and fatigue (testing may need to be broken into shorter sessions)”; “presence or history of mental health disorders (e.g., anxiety, depression)”; glasses and hearing aids “should be worn during assessment if applicable prescriptions are still appropriate”; “Clinicians should gather data in all languages used to determine the degree of functional impact”; “The identification and differential diagnosis of co-occurring impairments (e.g., cognitive-communication deficits, dysarthria, or acquired apraxia of speech) aid in planning an appropriate treatment plan”. Treatment: “Aphasia treatment is individualized to address the specific areas of need identified during assessment, including goals identified by the person with aphasia and their care partners”; it “can be restorative (i.e., aimed at improving or restoring impaired function) and/or compensatory (i.e., aimed at compensating for deficits not amenable to retraining)”; service delivery covers “dosage—frequency, intensity, and duration of service”; “Treatment typically begins in the acute or rehabilitation inpatient setting and may continue in post-acute care”; “Intensive treatment/programs (e.g., intensive aphasia day treatment) may be used for a time-limited period”; “Treatment extenders—such as care partners, volunteers, and community members—may be trained to stimulate and support communication”; “Clinicians may also use technology tools, such as computer programs and apps, as part of a home program”; “Community aphasia groups can help support work that is done within the clinical setting”; “Treatment occurs in the language(s) used by the person with aphasia—either by a bilingual SLP or through collaboration with interpreters, when necessary”; “Developing person-centered treatment plans, providing treatment, documenting progress, and determining appropriate dismissal criteria in collaboration with the patient and the treatment team”; “accommodations such as large print, pictures, and aphasia-friendly formatting to support comprehension of written health materials”. Named approaches (“This information is not exhaustive, nor does inclusion of any specific treatment approach imply endorsement from ASHA”): constraint-induced language therapy, “a treatment approach that focuses on increasing spoken language output while discouraging (constraining) the use of compensatory communication strategies (e.g., gesturing and writing). CILT also involves high-intensity training via massed practice”; melodic intonation therapy, which “uses melodic concepts (i.e., pitch, rhythm, and stress) to improve expressive language by engaging the right hemisphere of the brain” and “is often used to treat individuals with severe nonfluent expressive language deficits who have relatively intact receptive language skills”; semantic feature analysis, “a word retrieval treatment in which the person with aphasia identifies important semantic features of a target word that is difficult to retrieve”; Verb Network Strengthening Treatment, “an aphasia treatment to promote lexical retrieval in sentence context”; script training, in which “the clinician and the person with aphasia develop a scripted monologue or dialogue of an activity of interest and then practice it intensely until production of the scripted speech becomes automatic and effortless”; response elaboration training, “a treatment approach designed to improve spoken language by increasing the number of content words in persons with aphasia”; conversational coaching, “a treatment designed to teach verbal and nonverbal communication strategies to individuals with aphasia and their primary communication partners”; the Life Participation Approach to Aphasia, which “considers an intervention that emphasizes achieving or reengaging in life”; gestural facilitation of naming, “an approach that uses intact gesture abilities to facilitate the activation of word retrieval”; Visual Action Therapy, “a nonverbal treatment approach that trains individuals to use hand gestures to represent items that are not present”. AAC: “AAC approaches incorporate low-tech strategies (e.g., photos, communication books) and high-tech devices to enhance communication”; “AAC focuses on using the individual’s residual language abilities”. Prognosis: “The most predictive indicator of long-term recovery is initial aphasia severity, along with lesion site and size”; “Factors that may negatively affect improvement include poststroke depression”. Checked October 7, 2026.
8. The REhabilitation and recovery of peopLE with Aphasia after StrokE (RELEASE) Collaborators. Dosage, Intensity, and Frequency of Language Therapy for Aphasia: A Systematic Review-Based, Individual Participant Data Network Meta-Analysis. Stroke. 2022;53(3):956–967. doi:10.1161/STROKEAHA.121.035216 (PMID 34847708). “Data from 959 individual participant data (25 trials) were included”. “Greatest gains in overall language and comprehension were associated with >20 to 50 hours SLT dosage”; “Greatest clinical overall language, functional communication, and comprehension gains were associated with 2 to 4 and 9+ SLT hours/week”; “Greatest clinical gains were associated with frequent SLT for overall language, functional communication (3–5+ days/week), and comprehension (4–5 days/week)”; “Evidence of comprehension gains was absent for SLT ≤20 hours, <3 hours/week, and ≤3 days/week”; “Mixed receptive-expressive therapy, functionally tailored, with prescribed home practice was associated with the greatest overall gains”; “These exploratory findings suggest critical therapeutic ranges”. Background: people with aphasia “experience poorer functional outcomes” than stroke survivors without it, and “fewer return home or to work”. Language was measured with tests including the “Aachen Aphasia Test–Token Test”.
9. Breitenstein C, Grewe T, Flöel A, Ziegler W, Springer L, Martus P, et al. Intensive speech and language therapy in patients with chronic aphasia after stroke: a randomised, open-label, blinded-endpoint, controlled trial in a health-care setting. The Lancet. 2017;389(10078):1528–1538. doi:10.1016/S0140-6736(17)30067-3 (PMID 28256356). The FCET2EC trial: “patients aged 70 years or younger with aphasia after stroke lasting for 6 months or more were recruited from 19 inpatient or outpatient rehabilitation centres in Germany”; “We randomly assigned 158 patients” to “3 weeks or more of intensive speech and language therapy (≥10 h per week)” or to deferral; “3 weeks of intensive speech and language therapy significantly enhanced verbal communication in people aged 70 years or younger with chronic aphasia after stroke”. The primary outcome was the “Amsterdam-Nijmegen Everyday Language Test A-scale”.
10. Palmer R, Dimairo M, Cooper C, Enderby P, Brady M, Bowen A, et al. Self-managed, computerised speech and language therapy for patients with chronic aphasia post-stroke compared with usual care or attention control (Big CACTUS): a multicentre, single-blinded, randomised controlled trial. The Lancet Neurology. 2019;18(9):821–833. doi:10.1016/S1474-4422(19)30192-9 (PMID 31397288). “278 (34%) participants were randomly assigned”, all with aphasia diagnosed “at least 4 months before randomisation”; “Participants were a median of 2 years (IQR 11 months to 4 years) post-stroke”; “20–30 min practice daily was recommended over a 6-month period”. “CSLT plus usual care resulted in a clinically significant improvement in personally relevant word finding but did not result in an improvement in conversation”; “Improvement in word finding was maintained 6 months after the intervention period”; “evidence was not sufficient to suggest that improved word finding of treated words generalised to untreated words”. Language was assessed with the “Comprehensive Aphasia Test”. Funded by the National Institute for Health Research and the Tavistock Trust for Aphasia; “PE has a patent on the Therapy Outcome Measures (2015) used in this study, from which she receives royalties”.
11. Simmons-Mackie N, Raymer A, Cherney LR. Communication Partner Training in Aphasia: An Updated Systematic Review. Archives of Physical Medicine and Rehabilitation. 2016;97(12):2202–2221.e8. doi:10.1016/j.apmr.2016.03.023 (PMID 27117383). “All 25 of the current review articles reported positive changes from partner training”; “to date, 56 studies across 2 systematic reviews have reported positive outcomes from communication partner training in aphasia”; “communication partner training should be conducted to improve partner skill in facilitating the communication of people with chronic aphasia”; “Additional high-quality research is needed to strengthen the original 2010 recommendations and expand recommendations to individuals with acute aphasia”.
12. American Heart Association/American Stroke Association. Top Take-Home Messages for Speech Language Pathologists: 2026 AHA/ASA Adult Stroke Rehabilitation and Recovery Guidelines (PDF), written by two members of the guideline writing group. “Speech-language pathologists should screen and assess motor speech, language, hearing, and cognitive contributors to communication disorders to determine the best post-stroke rehabilitation approaches”; “Hearing impairments occur frequently after stroke thereby increasing the need for audiological evaluations to mitigate the impact of hearing loss on communication”; “Intensive, timely and individualized treatment offering a variety of restorative and compensatory approaches can facilitate language recovery in individuals with aphasia”; “Supported communication training is recommended as a therapeutic complement to traditional therapy to enhance the communication of individuals with aphasia”; “Augmentative and Alternative Communication (AAC) devices and modalities for patients with severe speech impairment or tracheostomy are reasonable” additions to communication, and computerized and group treatment can add to traditional therapy; “Group treatments have…functional communicative benefits that extend into social determinants of health while increasing treatment intensity at a lower cost”; “Telehealth management should be considered to improve specialized SLP service access for individuals with communication and swallowing impairments”. Checked October 7, 2026.
13. Centers for Medicare & Medicaid Services. Speech-language pathology services (Medicare.gov). Part B covers “medically necessary outpatient speech-language pathology services”, which “provide evaluation and treatment to regain and strengthen speech and language skills. This includes cognitive and swallowing skills, or therapy to improve or maintain current function or slow decline”; “Your doctor or other health care provider (including a nurse practitioner, clinical nurse specialist, or physician assistant) must certify you need this care”; after the Part B deductible you pay 20% of the Medicare-approved amount; “There’s no limit on how much Medicare pays for your medically necessary outpatient speech-language pathology services in one calendar year.” Checked October 7, 2026.
14. Centers for Medicare & Medicaid Services. Telehealth (Medicare.gov). “Through December 31, 2027, Medicare covers telehealth services that you can get from anywhere in the U.S., including your home”; the examples listed include speech therapy, cognitive assessments and “Caregiver training services”; after the Part B deductible you pay 20% of the Medicare-approved amount, and “For most telehealth services, you’ll pay the same amount that you would if you got the services in person”; Medicare Advantage plans “may offer more telehealth benefits than the basic coverage in Original Medicare.” Checked October 7, 2026.
15. Godecke E, Armstrong E, Rai T, Ciccone N, Rose ML, Middleton S, et al. A randomized control trial of intensive aphasia therapy after acute stroke: The Very Early Rehabilitation for SpEech (VERSE) study. International Journal of Stroke. 2021;16(5):556–572. doi:10.1177/1747493020961926 (PMID 33019888). “Among 13,654 acute stroke patients screened, 25% (3477) had aphasia”; “246 randomized”. The high-intensity arms were “prescribed 20 sessions of 45–60 min (15–20 h; or 4–5 h per week) of aphasia therapy, commencing before day 15 and completed within four weeks”; “Early, intensive aphasia therapy did not improve communication recovery within 12 weeks post stroke compared to usual care”; the trial “did not evaluate chronic recovery or the effect of ‘treatment’ versus ‘no treatment’”. The primary outcome was the “Western Aphasia Battery-Revised Aphasia Quotient”.
16. Pedersen PM, Jørgensen HS, Nakayama H, Raaschou HO, Olsen TS. Aphasia in acute stroke: incidence, determinants, and recovery. Annals of Neurology. 1995;38(4):659–666. doi:10.1002/ana.410380416 (PMID 7574464). “an unselected and community-based sample of 881 patients with acute stroke”: “Thirty-eight percent had aphasia at the time of admission; at discharge 18% had aphasia”; “Stationary language function in 95% was reached within 2 weeks in those with initial mild aphasia, within 6 weeks in those with moderate, and within 10 weeks in those with severe aphasia”; “Initial severity of aphasia was the only clinically relevant predictor of aphasia outcome”.
17. American Speech-Language-Hearing Association. Right Hemisphere Disorder (Practice Portal). “Word retrieval, syntax, morphology, and phonological processing are not typically affected by injury to the right hemisphere”; “Most people are left hemisphere dominant for language, so crossed aphasia is rare”. Checked October 7, 2026.
18. Roheger M, Riemann S, Brauer A, McGowan E, Grittner U, Flöel A, et al. Non-pharmacological interventions for improving language and communication in people with primary progressive aphasia. Cochrane Database of Systematic Reviews. 2024;(5):CD015067. doi:10.1002/14651858.CD015067.pub2 (PMID 38808659). “Primary progressive aphasia (PPA) accounts for approximately 43% of frontotemporal dementias”; “There is currently no curative treatment for PPA”; “We included 10 studies, with a total of 132 participants”; “Preliminary evidence suggests that the combination of active tDCS with specific language therapy may improve impaired word retrieval for specifically trained items beyond the effects of behavioural treatment alone”; “There is currently no high-certainty evidence to inform clinical decision-making regarding non-pharmacological treatment selection for people with PPA”.
19. National Institute on Aging. Frontotemporal Disorders: Causes, Symptoms, and Diagnosis. “There are three types of PPA, categorized by the language problems that appear first”: “Semantic PPA: A person slowly loses the ability to understand single words and sometimes to recognize the faces of familiar people and common objects”; “Agrammatic PPA: A person has more and more trouble speaking and may omit words that link nouns and verbs (such as to, from, and the)”; “Logopenic PPA: A person has trouble finding the right words during a conversation but can understand words and sentences”. “Logopenic PPA is usually accompanied by the hallmark brain changes seen in Alzheimer’s”; “Many people with PPA develop symptoms of dementia”. Checked October 7, 2026.
20. American Speech-Language-Hearing Association. Dementia (Practice Portal). “individuals with frontotemporal dementia may develop primary progressive aphasia, a gradual loss of language function with relatively well-preserved memory”; “Within the United States, an estimated 50,000–60,000 people are currently living with the two types of frontotemporal dementia: primary progressive aphasia and behavioral variant frontotemporal dementia”. Checked October 7, 2026.
21. Gorno-Tempini ML, Hillis AE, Weintraub S, Kertesz A, Mendez M, Cappa SF, et al. Classification of primary progressive aphasia and its variants. Neurology. 2011;76(11):1006–1014. doi:10.1212/WNL.0b013e31821103e6 (PMID 21325651). “Criteria for the 3 variants of PPA—nonfluent/agrammatic, semantic, and logopenic—were developed by an international group of PPA investigators”; for the nonfluent variant, “Agrammatism in language production and effortful speech are the core criteria, and at least one should be present”; for the semantic variant, “anomia and single-word comprehension deficits are the core features, both essential for diagnosis”; “Word retrieval (in spontaneous speech and confrontation naming) and sentence repetition deficits are the core features of the logopenic variant”.
22. MedlinePlus Medical Encyclopedia, National Library of Medicine. Speech impairment in adults. “Dysarthria, which is difficulty pronouncing words, is sometimes confused with aphasia, which is difficulty producing language. They have different causes”; “In some cases, people may have both aphasia and dysarthria”; the term “does not apply to children who have never developed communication skills”; “Mental health counseling may help with depression or frustration that many people with speech impairment have”; contact a provider if “Impairment or loss of communication comes on suddenly”. Checked October 7, 2026.
23. Rose ML, Nickels L, Copland D, Togher L, Godecke E, Meinzer M, et al. Results of the COMPARE trial of Constraint-induced or Multimodality Aphasia Therapy compared with usual care in chronic post-stroke aphasia. Journal of Neurology, Neurosurgery, and Psychiatry. 2022;93(6):573–581. doi:10.1136/jnnp-2021-328422 (PMID 35396340). “We analysed 201 participants (70 in CIAT-Plus, 70 in M-MAT and 61 in UC)”; “CIAT-plus preferences speech production and verbal therapist cueing; M-MAT includes multimodal tasks and cues (drawing, gesturing and writing)”, both “delivered in a small group setting of 2–4 participants”; sessions “ran 3 hours a day, 5 days per week for 2 weeks (30 hours)”. “Aphasia severity was not significantly different between groups at postintervention”, but “Word retrieval, functional communication and communication-related quality of life were significantly improved following CIAT-Plus and M-MAT”; “Word retrieval benefits were maintained at 12-week follow-up”, with “maintenance of approximately 50% of the original posttherapy gain at 12 weeks follow-up”. Background: “Aphasia persists into the chronic phase in approximately 20% of stroke survivors”.
24. Popescu T, Stahl B, Wiernik BM, Haiduk F, Zemanek M, Helm H, et al. Melodic Intonation Therapy for aphasia: A multi-level meta-analysis of randomized controlled trials and individual participant data. Annals of the New York Academy of Sciences. 2022;1516(1):76–84. doi:10.1111/nyas.14848 (PMID 35918503). “22 studies—overall 129 participants—met all eligibility criteria”; “RCT evidence on validated outcomes revealed a small-to-moderate standardized effect in noncommunicative language expression for MIT—with substantial uncertainty”; “Progress on validated tests arose mainly from gains in repetition tasks rather than other domains of verbal expression, such as everyday communication ability”; “MIT’s effect size was 5.7 times larger for non-RCT data compared to RCT data”.
25. Efstratiadou EA, Papathanasiou I, Holland R, Archonti A, Hilari K. A Systematic Review of Semantic Feature Analysis Therapy Studies for Aphasia. Journal of Speech, Language, and Hearing Research. 2018;61(5):1261–1278. doi:10.1044/2018_JSLHR-L-16-0330 (PMID 29710193). “Twenty-one studies were reviewed reporting on 55 persons with aphasia”; “Naming of trained items improved for 45 participants (81.82%)”; “Effect sizes indicated that there was a small treatment effect”; “Further research is warranted to examine the efficacy of SFA and generalization effects in larger controlled studies”.
26. Edmonds LA, Mammino K, Ojeda J. Effect of Verb Network Strengthening Treatment (VNeST) in Persons With Aphasia: Extension and Replication of Previous Findings. American Journal of Speech-Language Pathology. 2014;23(2):S312–S329. doi:10.1044/2014_AJSLP-13-0098 (PMID 24687125). “A multiple baseline design across participants was conducted with 11 persons with aphasia due to stroke”; “Results showed significant improvement at posttreatment and maintenance on trained and untrained sentence probes and object and action naming”. A small study without a control group.
27. Cherney LR, Kinsey LE, Blaze EE, Gray EL, Kwasny MJ, Van Vuuren S. Dose Considerations and Generalization Following Script Training for Poststroke Aphasia: A Randomized Factorial Clinical Trial. Journal of Speech, Language, and Hearing Research. 2026; published online ahead of print. doi:10.1044/2026_JSLHR-26-00120 (PMID 42821294). “The study was a single-site, factorial, single-blind randomized controlled trial”; “Eighty-five participants with aphasia enrolled in the study”; “Participants completed 10, 1-hr sessions of computer-based script training”; “Within groups, there was significant improvement from baseline to posttreatment, which was generally maintained at 6 weeks posttreatment”; “there was a significant difference for session frequency with massed performing better than distributed”. Every group received script training; the trial compared schedules, not therapy with none.
28. Greener J, Enderby P, Whurr R. Pharmacological treatment for aphasia following stroke. Cochrane Database of Systematic Reviews. 2001;(4):CD000424. doi:10.1002/14651858.CD000424 (PMID 11687079). Ten trials; “Drugs used in the trials identified were piracetam, bifemalane, piribedil, bromocriptine, idebenone, and Dextran 40”; “We found weak evidence that patients were more likely to have improved on any language measure at the end of the trial if they had received treatment with piracetam”, though the trials “do give rise to some concerns that there may be an increased risk of death from taking piracetam”; “We could not determine if drug treatment is more effective than speech and language therapy”.
29. Elsner B, Kugler J, Pohl M, Mehrholz J. Transcranial direct current stimulation (tDCS) for improving aphasia in adults with aphasia after stroke. Cochrane Database of Systematic Reviews. 2019;(5):CD009760. doi:10.1002/14651858.CD009760.pub4 (PMID 31111960). “We included 21 trials involving 421 participants in the qualitative synthesis”; “Currently there is no evidence of the effectiveness of tDCS (anodal tDCS, cathodal tDCS and Dual-tDCS) versus control (sham tDCS) for improving functional communication in people with aphasia after stroke (low quality of evidence)”; “there is limited evidence that tDCS may improve naming performance in naming nouns (moderate quality of evidence), but not verbs (very low quality of evidence)”; “We did not find reported serious adverse events”.
30. Bowen A, Hesketh A, Patchick E, Young A, Davies L, Vail A, et al. Effectiveness of enhanced communication therapy in the first four months after stroke for aphasia and dysarthria: a randomised controlled trial. BMJ. 2012;345:e4407. doi:10.1136/bmj.e4407 (PMID 22797843). ACT NoW: “170 adults (mean age 70 years) randomised within two weeks of admission to hospital with stroke”; therapy could be “up to three contacts per week for up to 16 weeks”, and averaged “22 contacts (18 hours) over 13 weeks”. The comparison was “similarly resourced social contact (without communication therapy) from employed visitors”. “The estimated six months group difference was not statistically significant, with 0.25 (95% CI –0.19 to 0.69) points in favour of therapy.” “Communication therapy had no added benefit beyond that from everyday communication in the first four months after stroke.”
31. American Heart Association News. Stroke rehab should start early and address physical, cognitive and mental health (August 27, 2026). “The new guideline, which replaces the 2016 version, reflects the latest science in assessing and implementing stroke rehabilitation needs”; “Rehabilitation after a stroke should begin in the hospital as soon as the person is medically stable, ideally within 48 hours of the stroke”. Checked October 7, 2026.
32. Richards LG, Ifejika NL, Stein J, Bahouth MN, Abshire Saylor M, Barrett AM, et al. 2026 Guideline for Adult Stroke Rehabilitation and Recovery: A Guideline From the American Heart Association and American Stroke Association. Stroke. 2026;57(10):e514–e658. doi:10.1161/STR.0000000000000536 (PMID 42657476). Published online August 27, 2026; it “replaces the 2016 "Guidelines for Adult Stroke Rehabilitation and Recovery."” Key updates include “technology-enabled rehabilitation, caregiver support, participation, and safe return to work and driving”.
33. American Heart Association. 2026 Guideline for Adult Stroke Rehabilitation and Recovery: Top Things to Know. “Uncertainty remains regarding the best treatment approaches, their timing, and dosing”; “Periodic reassessment and re-engagement in therapy at various timepoints are important to inform new therapy targets or approaches and to prevent functional decline”; “It is critical that care partners receive education and training to support both their own well-being and to maximize the health and rehabilitation of the person for whom they care”; “Persons with stroke should be screened for depression and anxiety early after stroke, rescreened at various timepoints, and provided with treatment when needed”. Checked October 7, 2026.
34. Code of Federal Regulations, 42 CFR §410.61, Plan of treatment requirements for outpatient rehabilitation services. “The plan is established before treatment is begun by one of the following”, among them “A speech-language pathologist who furnishes the speech-language pathology services”; “The plan prescribes the type, amount, frequency, and duration of the physical therapy, occupational therapy, or speech-language pathology services to be furnished to the individual, and indicates the diagnosis and anticipated goals.” Text as published in the eCFR. Checked October 7, 2026.
35. Code of Federal Regulations, 42 CFR §424.24(c), Outpatient physical therapy, occupational therapy, and speech-language pathology services. When an SLP establishes the plan, “the certification must be signed by a physician or by a nurse practitioner, clinical nurse specialist, or physician assistant who has knowledge of the case”; “Recertification is required at least every 90 days”; “No references to an order or referral in this subsection shall be construed to require an order or referral for outpatient physical therapy, occupational therapy, or speech-language pathology services.” Text as published in the eCFR. Checked October 7, 2026.
36. Centers for Medicare & Medicaid Services. Medicare Benefit Policy Manual, Chapter 15: Covered medical and other health services (Rev. 13889, issued July 30, 2026), section 220.3. “The progress report provides justification for the medical necessity of treatment”; “The minimum progress report period shall be at least once every 10 treatment days.” Checked October 7, 2026.
37. Elman RJ, Bernstein-Ellis E. The Efficacy of Group Communication Treatment in Adults With Chronic Aphasia. Journal of Speech, Language, and Hearing Research. 1999;42(2):411–419. doi:10.1044/jslhr.4202.411 (PMID 10229456). Randomized, with deferred treatment as the control: “Twenty-four participants completed the 4-month treatment trial”; “all participants received 5 hours of group communication treatment weekly, provided by a speech-language pathologist”; “participants receiving group communication treatment had significantly higher scores on communicative and linguistic measures than participants not receiving treatment”; “No significant decline in performance occurred at time of follow-up”.
38. American Speech-Language-Hearing Association. Augmentative and alternative communication (Practice Portal). Unaided forms “do not require an external tool” (gestures, signs, facial expressions); aided forms “require some form of external tool, either electronic or nonelectronic”; “Examples of acquired disabilities that may benefit from AAC include cerebrovascular accidents (i.e., stroke); traumatic or acquired brain injuries; neurodegenerative diseases, such as ALS, supranuclear palsy, primary progressive aphasia, and apraxia; disability following surgeries (e.g., glossectomy, laryngectomy)”; “There are no prerequisites for AAC intervention”; “AAC use may help improve natural speech when used in a multimodal approach”; “selections can be made via eye gaze, head pointing, or scanning methods”, and direct selection can use a joystick, eye gaze, a head mouse or “brain–computer interface technology”; with voice banking “an individual can record a large inventory of speech, which is then used to create a synthetic voice that approximates their natural voice”, and “Voice banking should be completed when a communicator’s energy and skills are sufficient to generate clear speech”; with message banking “an individual can use their own voice or a proxy voice to digitally record and store messages, which may include words, phrases, sentences, and sounds using natural voice, inflection, and intonation”; “Medicare may not cover AAC devices in all settings (e.g., skilled nursing facilities, hospice).” Checked October 7, 2026.
39. Centers for Medicare & Medicaid Services. National coverage determination: speech generating devices (50.1). “Speech generating devices are considered to fall within the durable medical equipment (DME) benefit category”; “They are covered for patients who suffer from a severe speech impairment and have a medical condition that warrants the use of a device”; covered forms include “software that allows a computer or other electronic device to generate audible/verbal speech”; “Computers and tablets are generally not considered DME because they are useful in the absence of an illness or injury”; “Internet or phone services or any modification to a patient’s home to allow use of the speech generating device are not covered by Medicare.” Checked October 7, 2026.
40. Cacciante L, Kiper P, Garzon M, Baldan F, Federico S, Turolla A, et al. Telerehabilitation for people with aphasia: A systematic review and meta-analysis. Journal of Communication Disorders. 2021;92:106111. doi:10.1016/j.jcomdis.2021.106111 (PMID 34052617). “five studies met the inclusion criteria and were eligible for meta-analysis with a total of 132 participants with post-stroke aphasia”; “telerehabilitation training for aphasia seems to be as effective as the conventional face-to-face treatment”, though “evidence is still insufficient to guide clinical decision making due to the relatively low quality of the evidence identified”.
41. Laver KE, Adey-Wakeling Z, Crotty M, Lannin NA, George S, Sherrington C. Telerehabilitation services for stroke. Cochrane Database of Systematic Reviews. 2020;(1):CD010255. doi:10.1002/14651858.CD010255.pub3 (PMID 32002991). “We included 22 trials in the review involving a total of 1937 participants”, including “communication therapy for people with post-stroke language disorders”; “Studies comparing telerehabilitation and in-person therapy have also not found significantly different outcomes between groups, suggesting that telerehabilitation is not inferior”.
42. American Speech-Language-Hearing Association. Telepractice (Practice Portal). “Use of telepractice should be of equal quality to in-person services”; informed consent includes “the client’s right to request in-person services at any time”; “Clinicians should verify state licensure/certification requirements in the state from which the clinician provides services as well as the state in which the client receives services prior to initiating services.” Checked October 7, 2026.
43. National Highway Traffic Safety Administration. DriveWell: Driving After You Have a Stroke (PDF). After a stroke, “You may not be able to speak, to think or see clearly, or to control your body”; “Your health care provider will tell you how the stroke affected you, and when and if you can drive”; “in many areas, it is dangerous and even illegal to drive after a stroke without your doctor’s consent”; “A driver rehabilitation specialist can test how well you drive on and off the road”. The handout is about stroke in general. Checked October 7, 2026.
44. Job Accommodation Network (US Department of Labor, Office of Disability Employment Policy). Stroke. Stroke can cause “aphasia, which causes difficulty understanding and using language”; workers “may also have learned or be in the process of learning compensatory techniques such as using a slower rate of speech or using other communication methods like typing, writing, drawing, or gesturing to support and enhance communication”; accommodation ideas include “Communicate Another Way”. Checked October 7, 2026.
45. Job Accommodation Network (US Department of Labor, Office of Disability Employment Policy). Speech-language impairment. “The ADA does not contain a definitive list of medical conditions that constitute disabilities”; a person with a disability “has a physical or mental impairment that substantially limits one or more” major life activities, has a record of one, or is regarded as having one. Accommodation ideas: for no speech or unintelligible speech, an “Augmentative and Alternative Communication (AAC) Device”, “Communicate Another Way” and “Speech Generating Communication Devices with Telephone Access”, with job restructuring for unintelligible speech; for weak speech, a flexible schedule, job restructuring, voice amplification and “Outgoing Voice Amplification - Telephone”. Checked October 7, 2026.
46. Centers for Medicare & Medicaid Services. Home health services (Medicare.gov). Home health care helps you “maintain your current condition or level of function, or slow your rate of decline”; covered services include “speech-language pathology services (if you meet certain conditions)”; you must need part-time or intermittent skilled services and be homebound: “Leaving your home isn’t recommended because of your condition or you have trouble leaving your home without help” and “You’re normally unable to leave your home and leaving takes a lot of effort”; “You can still get home health care if you attend adult day care”; a provider “must see you in person and confirm you need home health care”; “You pay nothing for covered home health services.” Checked October 7, 2026.
47. Centers for Medicare & Medicaid Services. Skilled nursing facility care (Medicare.gov). Covered services include “Speech-language pathology services (if they’re needed to meet your health goal)”; Medicare covers SNF care only after “a prior medically necessary inpatient hospital stay of at least 3 days in a row”; eligibility includes needing skilled care “to improve or maintain your current condition, or to prevent or delay it from getting worse”; in 2026, “Days 1–20: You pay $0 each day after you pay the $1,736 deductible”; “Part A limits SNF coverage to 100 days in each benefit period.” Checked October 7, 2026.
48. Centers for Medicare & Medicaid Services. Inpatient rehabilitation care (Medicare.gov). Part A covers care in an inpatient rehabilitation facility, including rehabilitation services such as speech-language pathology; “Your health care provider must certify that you have a medical condition requiring intensive rehabilitation, continued medical supervision, and coordinated care from your providers”; in 2026, “Days 1-60: After you pay the $1,736 deductible you pay $0 each day.” Checked October 7, 2026.
49. Centers for Medicare & Medicaid Services. Therapy services. The Bipartisan Budget Act of 2018 repealed the outpatient therapy caps and “preserves the former therapy cap amounts as thresholds above which claims must include the KX modifier as a confirmation that services are medically necessary as justified by appropriate documentation in the medical record”; “For CY 2026 this KX modifier threshold amount is: $2,480 for PT and SLP services combined”; “the MR threshold is $3,000 for PT and SLP services”, and “not all claims exceeding the MR threshold amount are subject to review.” Checked October 7, 2026.
50. Centers for Medicare & Medicaid Services. Jimmo settlement. The Jimmo Settlement Agreement (January 2013) “clarified that the Medicare program covers skilled nursing care and skilled therapy services under Medicare’s skilled nursing facility, home health, and outpatient therapy benefits when a beneficiary needs skilled care in order to maintain function or to prevent or slow decline or deterioration (provided all other coverage criteria are met)”; coverage “does not turn on the presence or absence of a beneficiary’s potential for improvement, but rather on the beneficiary’s need for skilled care.” Checked October 7, 2026.
51. Medicaid.gov (Centers for Medicare & Medicaid Services). Mandatory & optional Medicaid benefits. “States are required to provide all mandatory benefits under federal law. States may provide optional benefits if they choose to add them through the state plan process”; mandatory benefits include home health services and nursing facility services; optional benefits include “Speech, hearing and language disorder services.” Checked October 7, 2026.
52. HealthCare.gov (Centers for Medicare & Medicaid Services). What Marketplace health insurance plans cover. “All plans offered in the Marketplace cover these 10 essential health benefits”, among them “Rehabilitative and habilitative services and devices (services and devices to help people with injuries, disabilities, or chronic conditions gain or recover mental and physical skills)”; “Specific services covered in each broad benefit category can vary based on your state’s requirements.” Checked October 7, 2026.
53. Veterans Health Administration. VHA Directive 1170.02(1): VHA audiology and speech pathology services (December 9, 2020; amended July 19, 2022). The directive covers “disorders of hearing, tinnitus, balance, speech, language, voice, fluency, cognitive and swallowing”; “Audiology and speech pathology services are standard medical benefits available to all enrolled Veterans.” Checked October 7, 2026.
54. American Heart Association/American Stroke Association. Key Patient Messages: The 2026 Stroke Rehabilitation and Recovery Guideline (PDF). “Stroke recovery occurs over months to years and does not end when you leave a structured program”; “Depression and anxiety are very common conditions that can develop after a stroke”. Checked October 7, 2026.
55. Kauhanen ML, Korpelainen JT, Hiltunen P, Määttä R, Mononen H, Brusin E, et al. Aphasia, depression, and non-verbal cognitive impairment in ischaemic stroke. Cerebrovascular Diseases. 2000;10(6):455–461. doi:10.1159/000016107 (PMID 11070376). “We studied a series of 106 consecutive patients”; “Aphasia was diagnosed in 34% of the patients during the acute phase, and two thirds of them remained so 12 months later”; “Seventy percent of the aphasic patients fulfilled the DSM-III-R criteria of depression 3 months and 62% 12 months after stroke”.
56. Vogel-Eyny A, Jung YJ, Hyun J, Siegle E, Haroun A, Nahar S, et al. Prevalence of depression in post-stroke aphasia: systematic review and meta-analysis. BMC Neurology. 2025;26(1):43. doi:10.1186/s12883-025-04570-1 (PMID 41388458). “Sixteen studies, including a total of 28,288 unique participants”; “The pooled prevalence of post-stroke depression in people with aphasia was 31.7%”; “There was significant between-study heterogeneity”.
57. American Speech-Language-Hearing Association. Acquired Apraxia of Speech (Practice Portal). “AOS is a neurologic speech disorder involving impaired planning or programming of phonetic and prosodic processes”; “Childhood apraxia of speech is a separate and distinct disorder”; “It is estimated that 44% of patients with chronic aphasia have some degree of AOS”; “AOS does not involve changes in muscle tone or strength, nor does AOS involve the language comprehension or production deficits that characterize aphasia”; “severe aphasia may mask the clinical features of AOS”. Its comparison chart marks muscle weakness as a feature of dysarthria only; articulatory deficits of apraxia of speech and dysarthria; language processing deficits of aphasia only; consistent error patterns of dysarthria only; and prosodic deficits and groping for articulatory postures as features that can also be seen in aphasia: “Prosodic errors and groping for articulatory postures can be seen in both aphasia and AOS, although they may present differently”. Checked October 7, 2026.
58. Flowers HL, Silver FL, Fang J, Rochon E, Martino R. The incidence, co-occurrence, and predictors of dysphagia, dysarthria, and aphasia after first-ever acute ischemic stroke. Journal of Communication Disorders. 2013;46(3):238–248. doi:10.1016/j.jcomdis.2013.04.001 (PMID 23642855). Chart review of 221 patients: “Estimates of the incidence of dysphagia, dysarthria, and aphasia were 44% (95% CI, 38-51), 42% (95% CI, 35-48) and 30% (95% CI, 25-37), respectively.” “The highest co-occurrence of any two impairments was 28% (95% CI, 23-34) for the presence of both dysphagia and dysarthria.”
59. American Speech-Language-Hearing Association. ASHA clinical specialty certification. A Board Certified Specialist (BCS) has demonstrated advanced knowledge and skills in an area; “Specialty certification is not required to practice in any area within the Audiology or Speech-Language Pathology Scopes of Practice”; “Specialty certification is currently available through” five boards: the “American Audiology Board of Intraoperative Monitoring”, the “American Board of Augmentative and Alternative Communication”, the “American Board of Child Language and Language Disorders”, the “American Board of Fluency and Fluency Disorders” and the “American Board of Swallowing and Swallowing Disorders.” Checked October 7, 2026.
60. American Speech-Language-Hearing Association. Information about ASHA certification. The CCC is “a nationally recognized professional credential that represents a level of excellence in the field”; holders “have voluntarily met rigorous academic and professional standards, typically going beyond the minimum requirements for state licensure.” Checked October 7, 2026.
61. American Speech-Language-Hearing Association. Audiology and speech-language pathology certification. ASHA’s public tool lets anyone “Verify the status of an individual’s Certificate of Clinical Competence in Audiology (CCC-A) or Speech-Language Pathology (CCC-SLP).” Checked October 7, 2026.

Medical disclaimer. This page is for general educational purposes and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your individual situation.