The Reflex Your Child Was Supposed to Outgrow

Your son cannot sit still at the table.

He slides off his chair. He hooks one foot under his leg. He hates the tag in his shirt. He cries when the plans change. His handwriting looks like it was done on a moving train, and his classroom aide, who is kind and tired, has used the word attention three times this month.

He has been evaluated for behavior. He has been offered accommodations. He has been told to try harder, and I promise you that he is trying harder than anyone in the room.

Here is a question almost nobody asks that family.

Has anyone checked the reflexes he was born with?

Every human baby arrives with a set of automatic movement patterns, generated largely in the brainstem. They helped you get through the birth canal. They helped you find the breast. They kept you alive before you had any voluntary control at all. They were supposed to do their work and then step aside as the higher brain came online.

Sometimes they do not step aside.

A child with a retained reflex may not have a behavior problem. They may have a wiring sequence that never finished.

What Primitive Reflexes Actually Are

Primitive reflexes are stereotyped responses to specific stimuli. Touch a newborn cheek, and the head turns toward it. Press a finger into the palm, and the hand grips. These responses do not require thought. They are built into circuits low in the nervous system.

Their disappearance is one of the great events of early development. As the cortex matures, it sends descending inhibitory signals that quiet these reflexes and fold them into more sophisticated movement. The reflex is not erased so much as integrated. It becomes a building block for rolling, crawling, sitting, and standing.

Pediatricians use this idea routinely. Reflexes that are absent at the expected age, or that persist long past it, are recognized signs that something deserves a closer look in infants.

There is another piece of established neurology worth knowing. In adults with brain injury or neurodegenerative disease, some of these reflexes can return. Clinicians call them frontal release signs. The higher brain loses its grip, and the older pattern reappears.

That single fact tells you what these reflexes are. They are not a childhood curiosity. They are a living record of how well the top of the brain is regulating the bottom.

Meet the Reflexes

I evaluate a number of reflexes in the office, and each one has its own signature.

The Moro reflex is the startle. A sudden change in head position, sound, or light causes the arms to fling outward and then draw in, with a catch of breath. It is typically expected to fade in the first several months. When I see it persist, I think about a nervous system stuck on high alert: a child who startles easily, hates surprises, melts down in noise, and struggles to settle at night.

The spinal Galant reflex is triggered by touch along one side of the lower back, causing the hips to curve toward that side. It may play a role in birth. When it lingers, I think about the wiggling child who cannot tolerate a waistband, cannot sit in a chair, and may wet the bed well past the expected age.

The asymmetrical tonic neck reflex looks like a fencing pose. When an infant turns the head to one side, the arm and leg on that side extend. When it persists, turning the head toward a paper can pull on the writing hand. Crossing the midline becomes work. Reading and handwriting cost more than they should.

The symmetrical tonic neck reflex emerges later and is connected to the transition into crawling. When the head extends, the arms straighten and the legs bend. When it lingers, a child may slump at a desk, sit in a W position, or struggle to copy from the board, because the eyes and the body are pulling against each other.

The tonic labyrinthine reflex links head position to whole-body muscle tone through the vestibular system. When it remains, balance, posture, and spatial orientation can suffer.

The rooting and palmar reflexes connect mouth and hand. When they linger, I look at speech, feeding, grip, and how the tongue moves.

Honest Limits

I care about being precise here, because this topic attracts exaggeration.

Studies have found associations between retained primitive reflexes and difficulties with attention, reading, and motor coordination in school-age children. Association is not causation. The research includes small studies with varied methods, and there is ongoing debate about how much reflex-based programs change outcomes beyond other forms of motor and developmental support.

I do not tell a family that a reflex explains everything. I do not tell them that integration exercises replace an evaluation for autism, a hearing test, a vision exam, or a careful look at nutrition.

What I do say is this. As a working clinical hypothesis, retained reflexes are a useful window into brainstem maturity and the top-down inhibition of the nervous system. They are easy to examine, they are painless, and they give us somewhere to begin. In my experience, they change how a family understands their child.

And that alone can be transformative. A mother who has spent years hearing that her son is defiant can look at him differently when she watches his arms fling outward from a gentle head drop.

Why a Reflex Might Linger

Development is a sequence, and sequences can be interrupted. There is rarely one cause, and it is never a matter of parental blame. These are the contributors I consider.

• Birth events. Prolonged labor, a very fast delivery, forceps or vacuum assistance, or cesarean birth may change the mechanical forces on the head and neck. The connection to reflex retention remains a clinical hypothesis.

• Tension in the neck, the cranial base, and the fascia, which can limit normal head movement in infancy.

• Tongue and lip ties, which change feeding, breathing, and the input traveling through the brainstem.

• Skipped or brief movement stages. Long hours in seats, swings, and carriers can reduce time on the floor. Crawling is not cosmetic. It coordinates both sides of the brain with the eyes, the hands, and the vestibular system.

• Illness, chronic ear infections, and head injuries, which can interrupt or reset development.

• Inflammation and toxic burden. A developing brain is exquisitely sensitive to its chemical environment, including mold exposure in the home, and to nutrients such as iron, iodine, and omega-3 fats.

• Stress and instability in the early environment, which keep the nervous system oriented toward survival.

Notice that this list spans the structural, the chemical, and the emotional. That is exactly why a single specialist may never see the whole picture.

What I Look For in an Exam

A comprehensive functional neurological exam for a child looks a great deal like play, which is by design.

I ask a child to stand with feet together and close their eyes. I gently guide their head forward and back. I watch whether their arms drift. I ask them to crawl, cross the midline, walk on a line, and track a target with their eyes. I look at saccades and pursuits, because eye movements are one of the most direct ways to examine brainstem and cerebellar function. I observe the tongue, the palate, and how they breathe. I examine the neck and the cranial base. I note whether they are mouth breathers.

Then I step back from the reflex and consider the terrain. Ferritin. Vitamin D. Omega-3 status. Gut function and stool patterns. Food reactions. Sleep. Mold in the home. A child with a sluggish gut and low iron is working with a very different nervous system than a child without those burdens.

Why Movement Rewrites the Pattern

Integration is built on a simple principle of neuroplasticity. The brain changes through specific, repeated, attention-engaging input. Neurons that are stimulated together strengthen their connections, and the cerebellum refines movement through thousands of small corrections.

So we return to the sequence. A typical plan may include slow, deliberate movements that mimic the reflex, along with rolling, crawling, cross-body patterns, and balance work. The dose is small and frequent: a few minutes daily, not an hour of battle. Consistency matters far more than intensity. Many families find this becomes a quiet ritual at bedtime.

Importantly, we add load in order. A child whose stress response is in overdrive cannot do precise neurological work. We calm the system first, clear what we can from the bucket, address the feeding and the airway, and then we build. If a child becomes dysregulated after an exercise, that is useful information. It means we dose it down.

This is not a two-week fix. Reflex work is often measured in months, and we reassess as we go.

What the School Day Feels Like From Inside

Imagine a school day from inside a nervous system with these patterns.

The bell rings, and the Moro response fires before the thinking brain has a vote. Your heart rate jumps. Cortisol rises. Twenty children are moving at once, the fluorescent lights hum, and someone scrapes a chair. A classmate brushes your back. All of this arrives with the same urgency, because the filter that should sort the important from the irrelevant is still under construction.

Then you are asked to sit still. Sitting still, for your body, is not rest. It is an active project. You hold your head upright against a tone pattern that wants to pull you forward. You keep your feet on the floor while your hips want to move. You look up at the board, and your arms want to straighten. You look down at the paper, and your legs want to extend.

Now you are asked to write.

Every ordinary task requires your cortex to manage the movement by hand. In a mature system, the cerebellum and basal ganglia automate these things, freeing your attention for ideas. In your system, the conscious brain is doing the work of the automatic brain. There is very little left for fractions.

This is why I wince at the phrase attention deficit in so many of these conversations. Often I do not see a deficit of attention. I see a surplus of demands on attention. The child has been paying attention to everything, including their own body, all day long.

The Sensory Layer

Primitive reflexes rarely travel alone. They often arrive with sensory differences, and the two can reinforce each other.

Three sensory systems deserve particular attention, because they rarely appear on a school report.

The vestibular system lives in your inner ear and tells your brain where your head is in space. It feeds directly into the circuits that stabilize your eyes and your posture. When it is underactive, a child may crave spinning, swinging, and crashing into furniture. When it is overreactive, a child may fear stairs, playground equipment, and car rides.

The proprioceptive system reports the position of your muscles and joints. A child with poor proprioceptive input may press too hard with a pencil, hug too tightly, or seek heavy pressure under blankets.

The tactile system reports touch, and it has both a discriminating branch and a protective branch. When the protective branch dominates, a sock seam can feel like an assault.

Each of these is a stream of information into the brainstem and the cerebellum. In typical development, thousands of hours of crawling, climbing, and tumbling calibrate them. This is one reason unstructured outdoor play is not a luxury. For a developing nervous system, a fallen tree across a creek may be a better workout than any device ever designed.

A Simple Timeline for Parents

Timelines vary from child to child, so please read these as gentle landmarks and not as a test.

• In the newborn months, watch for symmetry. Does your baby turn the head easily in both directions? Does feeding feel coordinated? A strong preference for one side deserves attention early.

• Around three to six months, look for growing head control, time spent on the belly, and rolling.

• Around six to ten months, look for pivoting, rocking on hands and knees, and crawling. Please do not rush a baby to walk. Each stage of floor movement is doing work.

• Around one to two years, look for walking with arms lowering over time, climbing, squatting, and early language.

• Around three to five years, look for hopping, balancing, drawing, and the growing ability to wait.

• Around six to eight years, look for riding a bicycle, skipping, crossing the midline with ease, and sitting long enough to write a few sentences.

If something on this list concerns you, there is no need to panic and no benefit in waiting for a child to simply outgrow it. An evaluation is information, and early information widens your choices.

Early does not mean urgent, though, and late does not mean too late. I have watched teenagers and adults make meaningful changes. The window of neuroplasticity narrows in some respects, but it never closes.

What About Adults?

I see this in grown patients all the time. The adult who startles at every sound. The woman who gets carsick and cannot tolerate grocery store aisles. The man who has never been able to sit still through a meeting, and who has built a whole career around pacing.

Many adults have compensated brilliantly. Compensation is the real story of a long life. However, compensation costs energy. When illness, perimenopause, a concussion, or chronic stress takes away the surplus, the old pattern can become visible again.

Your nervous system still carries its earliest chapters. That is not a verdict. It is a map.

For the Parent Reading This

If this sounds like your child, please set down the guilt. Nothing here is about what you failed to do. You did not cause this by using a car seat.

Your child is not lazy, defiant, or broken. Your child may be working twice as hard as other children just to hold still, and that effort has a price. By the end of a school day, there is nothing left, and the meltdown happens in the safest place they know: with you.

There is a developmental question underneath the behavior, and it deserves a real answer. We can examine it. We can map it. We can reduce neuroinflammation, build the missing movement patterns, and give that young brain the signals it has been waiting for.

Our brain is the master system, at any age, and the brain of a child is remarkably responsive to the right input at the right time.

Their sequence can resume. Their body can settle. Their brilliance can finally show up in the room.

Schedule Your Comprehensive Functional Neurological Exam Today

Book your Comprehensive Functional Medicine Eval/Neurological Exam today to discover what the contributing root causes are that are underlying your health concerns.

Begin at drleiladoolittle.com. I see patients by telehealth and in person in Dallas, Texas and Compton, Arkansas.