Ten signs your child may have retained primitive reflexes

Primitive reflexes are the automatic movement responses that every baby is born with. They are essential in the earliest months of life: they help a newborn feed, respond to sudden movement, and begin to interact with the world. As the brain matures, these reflexes are gradually inhibited and replaced by more controlled, voluntary movement. This process happens largely in the first few years, and when it completes as expected, it lays down the neurological foundations for learning, behaviour, and emotional regulation.

When reflexes are not fully integrated, the body continues to respond to the world in an earlier, more instinctive way. The nervous system is, in a sense, still running older software. The effects can be wide-ranging and often look nothing like what parents might expect. Retained reflexes do not show up as obvious physical difficulty. They show up in the ordinary details of a child's day.

Here are ten signs worth paying attention to.

Pencil grip difficulties or unusually tense handwriting

If your child holds their pencil very tightly, wraps their thumb awkwardly across their fingers, or complains that their hand aches after short periods of writing, this may relate to a retained Palmar reflex. This early reflex causes the hand to grasp automatically when pressure is applied to the palm. When it persists, fine motor control is compromised and the hand never fully moves on from that gripping response.

Emotional outbursts that seem out of proportion

The Moro reflex is the newborn startle response: a full-body reaction to unexpected stimulus that triggers the fight-or-flight system. When this reflex is retained, the nervous system stays in a state of low-level alertness. Small triggers, a change of plan, an unexpected noise, a perceived disappointment, can produce a response that looks like an overreaction but is, in fact, a physiological one. These children are not choosing to react this way. Their nervous system is reacting for them.

Clumsiness, poor balance, or regularly bumping into things

Difficulties with coordination and spatial awareness are often linked to a retained Tonic Labyrinthine Reflex (TLR), which affects muscle tone, posture, and the vestibular system. Children with this pattern may trip frequently, misjudge distances, struggle on stairs, or have difficulty with ball sports. They are often described as awkward or accident-prone, when what is actually happening is that the body's sense of itself in space has not fully developed.

Hypersensitivity to sound, touch, light, or movement

Again, the Moro reflex is often involved here. A child whose startle system is still highly active will be more reactive to sensory input than their peers: bothered by clothing labels, easily overwhelmed by busy environments, disturbed by background noise that others simply filter out. This is not a personality trait or a sign of difficulty coping. It is a nervous system that has not yet learned to moderate its own responses.

Inability to sit still, or unusual sitting postures at a desk

If your child constantly slides off their chair, leans heavily forward onto the desk, sits on their feet, or seems unable to find a comfortable sitting position, this may point to a retained Symmetrical Tonic Neck Reflex (STNR). This reflex links head position to arm and leg muscle tone. When it is not fully integrated, maintaining an upright seated posture requires ongoing conscious effort, which means there is less mental capacity available for the actual task of learning.

Reading difficulties, particularly losing their place or skipping lines

The Asymmetrical Tonic Neck Reflex (ATNR) is closely associated with the ability to track smoothly across a page, coordinate both sides of the body, and cross the body's midline. Children with a retained ATNR may lose their place frequently when reading, find it difficult to copy from the board, or avoid reading tasks altogether. They often compensate by using a finger to track or by covering one eye. These strategies help, but they do not address the underlying issue.

Bedwetting beyond the expected age

This one often surprises parents. The Spinal Galant reflex, which is triggered by light touch along the lower spine, plays a role in the birth process and should integrate in the first year. When it is retained, pressure along the lower back or at the waistband of clothing can activate the muscles around the bladder. Children with this pattern may wet the bed regularly, experience urgency, or feel uncomfortable in clothing with tight waistbands. It is important to note that this is not a behavioural issue and should never be treated as one.

Car sickness or significant discomfort on public transport

Motion sickness in children is common, but when it is persistent and severe, it can indicate that the vestibular system has not fully matured. The TLR, along with other early reflexes, is central to how the brain processes movement information. Passive movement in a vehicle requires the brain to reconcile what the eyes are seeing with what the body is feeling. When the vestibular system is not well regulated, this process can be overwhelming and nauseating.

Difficulty with tasks that cross the body's midline

Tying shoelaces, cutting with scissors, catching a ball, and many everyday childhood tasks require the two sides of the body to work together and the arms or hands to cross from one side to the other. When the ATNR is retained, this crossing of the midline can feel effortful or be avoided altogether. You might notice your child switching their pencil or scissors from hand to hand, or struggling with tasks that seem straightforward for other children of the same age.

Anxiety, low tolerance for new situations, or quick exhaustion

A child whose nervous system is working hard just to manage everyday sensory and movement demands will have less capacity for everything else. This can present as anxiety, a resistance to change, low frustration tolerance, or a tendency to become tired quickly. It can look like a lack of resilience, or even emotional immaturity. What is often actually happening is that the child's nervous system is operating under a constant, low-level load that most people around them cannot see.

What to do if you recognise these signs

Seeing several of these signs in your child does not mean something is seriously wrong, and it does not mean that any earlier window has closed. Neurodevelopmental movement programmes based on the INPP method work by revisiting the developmental movement sequences the body needed to complete, in a gentle and structured way. The nervous system remains responsive to this kind of input throughout childhood, and meaningful change is possible at any age.

A full assessment begins with a detailed developmental history and standardised reflex testing, which gives a clear picture of which reflexes are retained, at what level, and how they are likely to be affecting your child. From there, a tailored daily movement programme is designed around your child specifically, not a general template.

If any of this feels familiar, an initial conversation is a good place to start. There is no obligation and no pressure. Sometimes, simply having a name for what you have been observing makes an enormous difference.