Sensory processing
The Palmar Grasp Reflex: Why Newborns Grip, and When They Stop
The grip on your finger is a reflex, not a choice. What it is for, and why letting go is the milestone that matters.
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Press gently on a newborn's palm and every finger closes around whatever is there. That is the palmar grasp reflex. It appears by 28 weeks of gestation and typically disappears by 4 to 6 months, as voluntary reaching and grasping take over.1 The grip is strong — strong enough that an infant gripping with both hands could briefly support their own weight, which is precisely why that is never tested.1 The developmental point is not the grip. It is the RELEASE: voluntary hand opening is what a child needs for manipulative play, for feeding themselves, and eventually for writing, and a palmar grasp persisting beyond 6 months is what stands in the way of it.1
What the palmar grasp reflex is
Gentle pressure on an infant's palm produces flexion of all the fingers around the stimulus. The examiner applies it with a finger, moving from the little-finger side of the hand toward the thumb side.1
The grip is genuinely strong. An infant grasping with both hands simultaneously could briefly support their own weight — which is stated in the clinical literature alongside the instruction that it should never be tested, for obvious reasons.1
The pathway. Touch receptors in the palm send signals along the median and ulnar nerves to spinal cord segments C8 to T1, and the finger flexors respond. As the frontal lobes mature, cortical inhibition gradually shuts the loop down.1
When it appears, and when it fades
| Point | What is expected1 |
|---|---|
| By 28 weeks of gestation | The reflex appears. |
| By 4 to 6 months | Typically disappears, coinciding with the development of voluntary reaching and grasping. |
| Beyond 6 months | Persistence prevents voluntary hand release. |
The plantar grasp — the same response in the foot — appears at the same point but lasts longer, disappearing between 9 and 12 months.1
How a clinician checks it
Testing happens when the infant is calm and alert; crying or sleeping can diminish the response.1 Three things get documented:1
What is recorded
- Strength — strong, moderate, weak, or absent.
- Symmetry — whether both hands do the same thing.
- Release — a normal grasp lets go when the back of the hand is stroked, or when the infant's attention moves elsewhere.
Why release is the milestone, not grip
Persistence of the palmar grasp beyond 6 months prevents the development of voluntary hand release — and release is the prerequisite for manipulative play, for feeding skills, and eventually for writing.1
That is a sequence, not a claim about school performance. A child who cannot open their hand on purpose cannot put an object down where they want it, and everything built on that is delayed behind it.
Where this stops. A retained reflex does not automatically mean impairment,2 and the association between retained reflexes and later academic difficulty is correlational. A 2026 systematic review of 14 studies in children aged 3 to 11 without neurodevelopmental diagnoses found consistent negative associations with motor outcomes and with reading, spelling and mathematics, and concluded that the available evidence “remains limited and heterogeneous”.3
If you have been told your child has a retained palmar grasp
In an infant past six months who cannot deliberately let go of an object, that is worth raising with a doctor or a pediatric occupational therapist promptly. For an older child, the questions worth asking about any reflex-integration recommendation are on the parent article.
Frequently asked questions
Why do newborns grip your finger?
It is the palmar grasp reflex, not a choice. Pressure on the palm triggers touch receptors that signal along the median and ulnar nerves to spinal segments C8 to T1, and the finger flexors close the hand.
When does the palmar grasp reflex go away?
It appears by 28 weeks of gestation and typically disappears by 4 to 6 months, as voluntary reaching and grasping take over.
Can a baby really support their own weight gripping?
The grip is strong enough that an infant grasping with both hands could briefly do so. It should never be tested, for obvious safety reasons.
What happens if the palmar grasp does not fade?
Persistence beyond 6 months prevents the development of voluntary hand release, which is the prerequisite for manipulative play, feeding skills and eventually writing. It is worth raising with a doctor or a pediatric occupational therapist.
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.
- American Occupational Therapy Association. Practice guidance on reflex integration programs and occupational outcomes. Checked August 19, 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).
Medical disclaimer. This page is for general educational purposes and does not constitute medical advice, diagnosis, or treatment. Sensory and motor concerns are best assessed by an occupational or physical therapist who can evaluate your individual child.