Sensory processing
The Spinal Galant Reflex: What It Is and What Persistence Is Associated With
Stroke a newborn's back beside the spine and the hip on that side swings up. What that is for, and what is claimed about it later.
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The spinal Galant reflex — also called truncal incurvation — is elicited by stroking an infant's back about a centimeter to one side of the spine, from shoulder to buttock, while the infant is held face-down. The trunk flexes toward the stroked side and the pelvis swings upward on that side.1 It appears by 32 weeks of gestation and typically disappears by 4 to 6 months.1 Its likely purpose is mechanical: lateral flexion in response to pressure from the uterine wall may help position the fetus during delivery.1 This is the reflex most often invoked in claims about fidgeting and bedwetting in older children, and this page is careful about the difference between what is associated and what is established.
What the spinal Galant reflex is
The infant is held in ventral suspension — face down, supported. The examiner strokes down the back roughly one centimeter to the side of the spine, from the shoulder toward the buttock. The trunk flexes laterally toward the stimulated side, and the pelvis swings upward on that side.1
What it is thought to be for. The reflex may facilitate fetal positioning during delivery, by producing lateral flexion in response to pressure from the uterine wall.1
When it appears, and when it fades
| Point | What is expected1 |
|---|---|
| By 32 weeks of gestation | The reflex appears. |
| By 4 to 6 months | Typically disappears. |
When absence matters
An absent Galant reflex
An absent Galant reflex may indicate spinal cord pathology or peripheral nerve dysfunction.1 As with the Moro, absence in a newborn is a finding for a doctor rather than for a program.
What persistence is associated with
Persistence beyond infancy has been associated with bedwetting, with fidgeting while seated — the explanation offered is that clothing touching the back triggers the reflex — with poor concentration, and with difficulty in fine motor tasks.1
Read that carefully, because this reflex is where the strongest claims get made. "Associated with" is what the reference says, and it is not the same as "causes". A child who fidgets has many possible reasons to fidget; a child who wets the bed has many possible reasons for that too. Occupational therapy guidance is explicit that a retained reflex does not automatically mean impairment,2 and the 2026 systematic review of this literature concluded that the available evidence “remains limited and heterogeneous”.3
If you have been told your child has a retained Galant reflex
If the presenting problem is bedwetting or difficulty concentrating, those are worth assessing on their own terms first — both have common causes that are checked for routinely and treated directly. The questions worth asking about a reflex-integration recommendation are on the parent article.
Frequently asked questions
What is the spinal Galant reflex?
It is a newborn response also called truncal incurvation. Stroking the back about a centimeter to one side of the spine, from shoulder to buttock, makes the trunk flex toward that side and the pelvis swing upward.
When does the Galant reflex go away?
It appears by 32 weeks of gestation and typically disappears by 4 to 6 months.
Does a retained Galant reflex cause bedwetting?
Persistence beyond infancy has been ASSOCIATED with bedwetting, fidgeting while seated, poor concentration and fine motor difficulty. Association is not causation, and bedwetting has common causes that are checked for routinely. It is worth assessing directly rather than assuming a reflex explains it.
What does an absent Galant reflex mean?
An absent Galant reflex may indicate spinal cord pathology or peripheral nerve dysfunction, and should be assessed by a doctor.
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.