Sensory processing
The TLR: The Tonic Labyrinthine Reflex, and What Is and Is Not Known
Head position changes muscle tone through the whole body. One of the three reflexes found most often in school-age children — and one of the least precisely documented.
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The tonic labyrinthine reflex — the TLR — links the position of the head relative to the body to muscle tone throughout it: tipping the head back tends toward extension, tipping it forward toward flexion. Like the ATNR and the STNR it is described as a brainstem-mediated automatism that typically integrates during the first year.3 And like the STNR, it is one of the three reflexes found most often still active in school-age children,2 while being one of the two the standard clinical reference names without giving an integration window.1 That combination — frequently cited, loosely specified — is the thing to hold in mind when a program is built around it.
What is the tonic labyrinthine reflex (TLR)?
The tonic labyrinthine reflex connects head position, sensed through the vestibular apparatus of the inner ear, to muscle tone through the whole body. Tipping the head backward biases the body toward extension; tipping it forward biases toward flexion.
It is grouped with the ATNR and the STNR as a brainstem-mediated automatism which, in typical neurodevelopment, integrates within the first year of life.3 “Labyrinthine” refers to the labyrinth, the inner ear’s balance organ; our page on vestibular and proprioceptive processing covers that system.
What do TLR forward and TLR backward look like?
They are the two directions of one reflex: “TLR forward” is the flexion pattern, with the head tipped forward, and “TLR backward” is the extension pattern, with the head tipped back. Assessment protocols used with school-age children rate the two separately, each from 0 (no reflex activity) to 4 (a full, uncontrolled response).3
That rating is about all the published record pins down. The standard clinical reference describes neither direction and gives no picture of what a retained TLR looks like in an older child; it names the TLR only as one of seven dimensions in an assessment scale published in 2025, which has not yet achieved broad validation or formal endorsement by major pediatric or neurologic organizations.1 So a list of everyday signs attributed to a retained TLR forward or backward is worth one question: where does it come from?
When does the TLR integrate?
Within the first year of life in typical development, according to the studies that describe it,3 but the standard clinical reference gives the TLR no integration age at all.1
The StatPearls primitive-reflex chapter gives an appearance point and an integration window for the Moro, the ATNR, the palmar and plantar grasps, the Galant, the stepping reflex and the Babinski. For the TLR it gives neither — the reflex appears as one of seven dimensions in a named assessment scale, and nothing more.1
Why that is worth saying out loud. A reflex with no standard integration age cannot be shown to be integrating “late” against a standard. If a practitioner says a child’s TLR should have integrated by a particular age, that number is worth asking about.
TLR vs STNR: how are they different?
Both are assessed with the head bent forward and back, and neither has an integration age in the standard reference.1,3 The difference starts with the names: the TLR is named for the labyrinth of the inner ear and is described as changing tone through the whole body, while the STNR is named for the neck. They also appear together in the research: both are among the three reflexes most often found still active in school-age children.2
| TLR | STNR | |
|---|---|---|
| Named for | The labyrinth of the inner ear | The neck |
| How it is rated | In flexion and in extension, 0 to 43 | In flexion and in extension, 0 to 43 |
| Window in the standard reference | None given1 | None given1 |
| Among the three most often still active at ages 3 to 11 | Yes2 | Yes2 |
| In the ADHD meta-analysis | Not included5 | Moderate correlation, r = 0.395 |
The last row is the one most often blurred. The meta-analysis that put numbers on the link between tonic neck reflexes and ADHD covered the ATNR and the STNR only;5 a claim that the TLR is linked to attention in the same way does not come from it. The STNR has its own page, as does the ATNR.
What does the evidence say about a retained TLR?
It is among the most frequently observed. A 2026 systematic review of 14 studies in children aged 3 to 11 without neurodevelopmental diagnoses identified the ATNR, STNR and TLR as the reflexes most often found still active.2
The associations reported are with motor and academic performance. In that review, all six studies of motor development reported negative associations, particularly for locomotion, balance and manual dexterity; six further studies linked persisting reflexes to lower performance in reading, spelling and mathematics.2
What that is and is not. These are group-level associations across a heterogeneous set of studies. They do not establish that a persisting TLR causes a particular child’s difficulty, and no professional body describes it that way.4
If balance or posture is the everyday problem, it can be assessed directly; our page on postural difficulties covers what that assessment looks at.
Do exercises for a retained TLR work?
Possibly, but it has not been shown well enough to rely on. Five of the studies in that review evaluated interventions aimed at reducing persisting reflexes. Most reported improved developmental outcomes, with effect sizes from small to large; the review’s own conclusion is that the available evidence “remains limited and heterogeneous” and should be interpreted accordingly.2
A 2026 study shows why. It gave 27 autistic children aged 4 to 10 a 12-week program aimed at the ATNR, STNR and TLR, four sessions a week, and reported large improvements in motor, sensory and reflex scores. It had no control group, and its authors note that natural development may have contributed to the change.3
Read fairly, that is an argument for more research and for measuring function rather than reflexes — not an argument for a package of sessions bought in advance.
What should I ask before starting a reflex integration program?
Ask what functional difficulty is being targeted and how improvement will be measured. Those questions are set out in full on the parent article, and they carry more weight here than for the reflexes with documented infant timelines.
Before you sign up
- Which everyday task will change? AOTA advises against reflex integration programs without clear links to everyday outcomes.4
- How was the TLR rated, and with what tool? The newest scale is not yet broadly validated.1
- How will we know it worked? A standardized measure of the task, repeated, rather than a reflex score alone.4
- Where does the expected age come from? The standard reference gives none.1
The full questions to ask a provider are on the parent article. For a second view of balance and gross motor skills, you can find a pediatric physical therapist.
Frequently Asked Questions
What is the tonic labyrinthine reflex?
The TLR links the position of the head, sensed through the inner ear, to muscle tone throughout the body. Tipping the head back biases toward extension; tipping it forward biases toward flexion. It is described as a brainstem-mediated automatism that typically integrates during the first year.
At what age should the TLR integrate?
The standard clinical reference used here does not give the TLR an integration window, though it gives one for the Moro, ATNR, palmar grasp, Galant and others. If a practitioner names a specific age, it is reasonable to ask where it comes from.
Is a retained TLR linked to balance problems?
A 2026 systematic review found that all six of its included studies on motor development reported negative associations between persisting reflexes and motor outcomes, particularly locomotion, balance and manual dexterity. Those are group-level associations, not a mechanism in an individual child.
Do reflex integration exercises work for the TLR?
Five studies in that review evaluated such interventions and most reported improved outcomes, with effect sizes from small to large — while the review concluded that the evidence remains limited and heterogeneous. It is worth studying; it is not settled.
What is the difference between the TLR and the STNR?
Both are assessed with the head bent forward and back, and the standard clinical reference gives neither an integration age. The TLR is named for the inner ear's balance organ and is described as changing muscle tone through the whole body; the STNR is named for the neck. Only the STNR was included in the meta-analysis that linked tonic neck reflexes with ADHD.
What does labyrinthine mean in the tonic labyrinthine reflex?
It refers to the labyrinth, the balance organ of the inner ear, which senses the position of the head. The reflex is named for it because head position is what changes the muscle tone.
Sources
- Chamarthi VS, Gunasekaran V, Daley SF. Primitive Reflexes: Comprehensive Neurological Assessment Across the Lifespan. In: StatPearls. StatPearls Publishing; updated 2026. ncbi.nlm.nih.gov/books/NBK554606 (PMID 32119493). Checked August 25, 2026.
- Provazník A, Musálek M, Bob P, Větrovský T, Malambo C, Silva AF, Anderson D. Persisting primitive reflexes and motor and cognitive development in children: a systematic review. Acta Psychologica. 2026;266:106915. doi:10.1016/j.actpsy.2026.106915 (PMID 42061063).
- Bijle MA, Malawade M. Effectiveness of reflex integration exercises on sensory-motor outcomes in children with autism spectrum disorder: a quasi-experimental study. Cureus. 2026;18(7):e111970. doi:10.7759/cureus.111970 (PMID 42544248).
- American Occupational Therapy Association. Don’t use reflex integration programs for individuals with delayed primary motor reflexes without clear links to occupational outcomes. Recommendation AOTA8, Choosing Wisely clinician list, July 27, 2021. archived recommendation. Checked October 5, 2026.
- Wang M, Yu J, Kim HD, Cruz AB. Attention deficit hyperactivity disorder is associated with (a)symmetric tonic neck primitive reflexes: a systematic review and meta-analysis. Frontiers in Psychiatry. 2023;14:1175974. doi:10.3389/fpsyt.2023.1175974 (PMID 37484683).
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 child. Sensory and motor concerns are best assessed by an occupational or physical therapist who can evaluate your individual child.