Your child startles at the smallest sound. Homework turns into a nightly battle. They cannot sit in a chair for more than a minute, reading is a struggle, handwriting is a mess, and every teacher conference ends with the same shrug.
Then someone mentions retained primitive reflexes, and you have no idea what that means.
Here is the short version. Many of the symptoms parents describe, the meltdowns, the fidgeting, the reading and handwriting battles, can trace back to early reflexes that were supposed to switch off in infancy and never fully did. This is a reflex-by-reflex guide to the retained primitive reflexes symptoms you can actually spot at the dinner table and during homework.
What are primitive reflexes, and why should they fade in infancy?
Primitive reflexes are automatic movements every baby is born with, and most should fade during the first year of life as the brain matures. They are not learned. An infant does not decide to grasp a finger or fling their arms out when startled. These reflexes are automatic, wired in before birth to handle feeding, birth, and survival in the early months.
As a baby moves, rolls, and crawls, higher parts of the brain take over and those early reflexes quiet down. That handoff is a normal part of brain development. When a reflex sticks around past its window, it is called a retained primitive reflex, and it can quietly interfere with movement, attention, sensory processing, and learning for years.
This is more common than most parents expect. In one study of healthy preschool children, 89 percent still showed at least one retained reflex to some degree, and the researchers found that children with stronger reflex retention tended to have weaker motor skills. Retention is not a rare defect. It sits on a spectrum, and the good news is that it responds to the right kind of movement-based developmental work.
Moro reflex: the child who startles, worries, and melts down
The Moro reflex is the newborn startle response, and when it stays active past infancy, a child can live in a near-constant state of fight or flight. In a baby, a sudden noise or a feeling of falling makes the arms fling out and then pull back in. It is meant to integrate within the first few months.
When the Moro reflex is retained, the nervous system sits on a hair trigger. Parents often describe a child who overreacts to sudden sound, light, or touch, who melts down over small changes, and who seems anxious or easily overwhelmed. You may also see motion sensitivity, trouble with transitions, and a sensory child who cannot stand clothing tags, loud rooms, or unexpected hugs.
None of this is the child being difficult. A retained Moro reflex keeps the body braced for danger, so the fuse is short and the tank runs empty fast.
ATNR and STNR: the reading, handwriting, and posture reflexes
These two tonic neck reflexes shape how the eyes, hands, and posture work together, so when they linger they show up in reading, handwriting, and sitting at a desk.
The asymmetrical tonic neck reflex (ATNR) links head turning to arm movement. When a baby turns their head, the arm on that side straightens. A retained ATNR makes it hard to cross the midline of the body, disrupts the smooth eye tracking that reading requires, and often shows up as a child who loses their place on the page, has messy handwriting, grips a pencil awkwardly, mixes up left and right, and struggles to catch a ball. Retained ATNR is one of the most common patterns clinicians see.
The symmetrical tonic neck reflex (STNR) links the movement of the head to the bending of the arms and legs. A retained symmetrical tonic neck reflex is the reason behind the child who slumps at the table, wraps their legs around the chair, props their head on one hand, and hates copying from the board because looking up and down keeps changing their arms and posture. Some of these children skipped or shortened crawling as babies. Both the asymmetrical tonic neck reflex and the symmetrical tonic neck reflex affect fine motor and gross motor skills, which is why the fallout lands squarely on schoolwork.
Spinal Galant and TLR: fidgeting, bedwetting, and motion sickness
The spinal Galant and tonic labyrinthine reflexes govern the lower back and the body’s sense of balance, and retained versions explain a surprising cluster of symptoms parents rarely connect.
The spinal Galant reflex fires when the skin along the lower back is stroked, making the hip swing toward that side. When it is retained, a light touch from a waistband, a chair back, or a clothing tag can set off constant squirming. This is the classic can’t-sit-still child. A retained spinal Galant reflex is also strongly linked to fidgeting, poor concentration, and bedwetting past age five. If nighttime wetting is part of your picture, it is worth reading how the spinal Galant reflex connects to bedwetting in more detail.
The tonic labyrinthine reflex (TLR) is tied to balance and the vestibular system, the part of the body that tracks head position and gravity. A retained tonic labyrinthine reflex often shows up as poor posture, weak muscle tone, toe walking, car sickness, clumsiness, and trouble judging space and distance. These children may seem floppy or may work visibly hard just to hold themselves upright, and their sense of balance and coordination lags behind their peers.
If your child seems to fight their own body just to sit, read, or settle, a movement-based program is built to work with these exact reflex patterns instead of around them.
See how NDM sessions workIs it ADHD or retained reflexes? What the research actually says
It can look like both, because retained reflexes and ADHD share many of the same outward symptoms, and research shows the two are closely associated. Association is the key word here. The evidence links them, it does not say one causes the other.
A 2023 systematic review and meta-analysis found that children with more ADHD symptoms tend to show more non-integrated tonic neck reflexes, with a moderate positive correlation for both the asymmetrical tonic neck reflex and the symmetrical tonic neck reflex. A broader review in Frontiers in Neurology notes that retained primitive reflexes appear more often in children with ADHD, autism, and dyslexia, and that they are thought to reflect a maturational delay in the nervous system rather than damage or pathology.
Here is what that means for you as a parent. A retained reflex is not a substitute label for ADHD or autism, and checking reflexes does not rule any diagnosis in or out. Some children have retained reflexes and no diagnosis. Some have a diagnosis and retained reflexes, which is why reflex screening is best used to add one more piece to the picture, not to replace an evaluation with your child’s doctor.
What can parents do next?
The next step is simple: get the reflexes checked, starting with what you can observe at home and then moving to a professional evaluation.
At home, you can watch for the clusters above and run a few gentle checks yourself. We put together a walkthrough of how to test for retained primitive reflexes at home in about fifteen minutes. Treat it as screening, not diagnosis. A positive result at home is a reason to ask questions, not a final answer.
From there, a professional evaluation gives you a clear read on which reflexes are still active and what to do about it. This is where a movement-based developmental program comes in.
What is NeuroDevelopmental Movement? NeuroDevelopmental Movement (NDM) is a gentle, movement-based program that guides the brain back through the developmental movement patterns it may have missed the first time around. Active Healing in Danvers, MA has used it for more than 30 years to support children and adults working through developmental and neurological challenges. Learn how NDM works.
In an NDM evaluation, an evaluator watches your child move, checks which primitive reflexes are still present, and maps how those patterns connect to what you are seeing at home and school. From there, your child follows an individualized set of slow, gentle daily movements. By repeating the early developmental movements the body skipped, primitive reflex integration gives the nervous system another chance to settle the reflexes it never quite finished. If you are weighing your options locally, our guide to primitive reflex integration in Massachusetts compares the approaches families on Boston’s North Shore run into.
Ready to see what is really going on?
If your child is showing several of these signs, you do not have to keep guessing at the cause. Reach out and we will watch your child move, talk through what we notice, and tell you honestly whether NeuroDevelopmental Movement is a good fit for your family.
Thirty-plus years of this work in Danvers has taught us that naming the pattern is the first relief a parent feels. Book an NDM evaluation and let’s find out what your child’s reflexes are trying to tell you.
Frequently asked questions
- How do I know if my child has retained primitive reflexes?
- You cannot diagnose it from a symptom list alone, but clusters are a strong clue. A child who startles easily, cannot sit still, struggles with reading or handwriting, and still wets the bed past age five may have one or more retained reflexes. A few simple movements can be checked at home, and a trained evaluator can confirm which reflexes are still active. Think of it as gathering clues, not reaching a verdict.
- Do retained primitive reflexes go away on their own?
- Sometimes they fade with ordinary play and movement in early childhood, which is how integration is meant to happen. When they persist past the usual window, they often stay put until the brain gets another chance to move through the patterns it missed. Targeted, repeated developmental movements are the most common way families work on integration, and that can happen at almost any age.
- Is a retained primitive reflex a disability?
- No. A retained primitive reflex is a sign of a maturational delay in the nervous system, not a diagnosis or a disability in itself. Retained reflexes are common and sit on a spectrum. They are frequently seen alongside conditions like ADHD or dyslexia without being the same thing as those conditions.
- Can a child have more than one retained reflex at the same time?
- Yes, and it is very common. The brain develops as one connected system, so when it stays in a more immature pattern, several reflexes can remain active together. That is why a child often shows a whole cluster of symptoms rather than a single tidy sign, and why an individualized evaluation matters more than any one checklist.
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