Signs and Symptoms of Retained Primitive Reflexes in Children
What to Notice, What It May Mean, and When Support Might Help
Parents are often the first to notice when something feels harder for their child than it seems to be for others.
Sometimes it is physical.
Sometimes it is emotional.
Sometimes it is a quiet sense that their child is working very hard just to keep up.
When parents start reading about primitive reflexes, they are usually looking for understanding, not a label. This blog is designed to help parents notice patterns, understand what they may reflect in the nervous system, and know when additional support may be helpful, without creating unnecessary worry.
A quick reminder before we talk about signs
Primitive reflexes are normal. All babies are born with them.
Retained primitive reflexes are not a diagnosis, and they are not a statement that something is “wrong” with a child. They are one possible explanation for why certain aspects of movement, regulation, or learning may require more effort.
Many of the signs below are also common parts of childhood. What matters most is pattern, persistence, and impact on daily life, not any single behaviour in isolation.
Physical signs and the reflexes often involved
Some children with retained primitive reflexes show physical signs related to posture, balance, coordination, or endurance.
Moro reflex (startle reflex)
When the Moro reflex remains active, the nervous system may stay in a heightened alert state.
Parents may notice:
Strong startle responses
Difficulty coping with unexpected noise or movement
Easily overwhelmed by busy environments
Fatigue or emotional shutdown after stimulation
This reflects a nervous system that is working hard to detect and respond to perceived threat.
Tonic Labyrinthine Reflex (TLR)
TLR influences head position, muscle tone, and posture.
When retained, parents may notice:
Difficulty sitting upright without slouching
Poor postural endurance
Low muscle tone or stiffness
Fatigue during physical activity
Challenges with balance
Children may appear lazy or floppy, but their bodies are often working harder than it appears.
Asymmetrical Tonic Neck Reflex (ATNR)
ATNR supports early movement and coordination between the two sides of the body.
When retained, parents may notice:
Poor coordination
Difficulty crossing the midline
Messy or slow handwriting
Trouble copying from the board
One-sided dominance when moving
This reflex can significantly increase effort during writing and desk-based tasks.
Symmetrical Tonic Neck Reflex (STNR)
STNR supports the transition between floor movement and upright posture.
When retained, parents may notice:
Difficulty sitting still
Slouching or constantly changing position
W-sitting
Poor coordination between upper and lower body
Challenges transitioning between tasks
This can make classroom sitting particularly demanding.
Spinal Galant reflex
This reflex is linked to trunk movement and sensory input along the spine.
When retained, parents may notice:
Constant fidgeting or wriggling
Sensitivity to clothing or waistbands
Difficulty sitting still in chairs
Bedwetting beyond the expected age
Digestive discomfort during stress
This reflects a nervous system seeking movement and sensory regulation.
Emotional and behavioural signs
Because primitive reflexes are driven by the nervous system, they can influence emotional responses and regulation.
Parents may notice:
Big emotional reactions to small triggers
Difficulty calming once upset
Impulsivity or reactivity
Anxiety around new situations
Emotional exhaustion after school or social time
These signs do not mean a child is being difficult. They often reflect a nervous system that is highly alert or easily overwhelmed.
Learning and school-related signs
In learning environments, retained reflexes can add extra load to tasks that already require attention, posture, and endurance.
Parents and teachers may notice:
Difficulty sitting still for extended periods
Challenges with focus or attention
Fatigue with reading or writing
Messy, slow, or effortful handwriting
Avoidance of desk-based tasks
Difficulty copying information
These challenges are not about intelligence. Many children experiencing this are bright, creative, and capable, but their nervous systems are working harder behind the scenes.
Sensory and regulation-based signs
Primitive reflexes can influence how children process sensory input and regulate their bodies.
Parents may observe:
Sensitivity to noise, light, or touch
Constant movement or fidgeting
Seeking pressure, movement, or deep input
Difficulty with transitions
Trouble settling at bedtime
Digestive discomfort during stress
These signs reflect a nervous system seeking regulation, not misbehaviour.
When it may be helpful to explore further
It may be worth exploring nervous system support if:
Multiple signs are present across settings
Challenges are persistent rather than occasional
Daily activities feel exhausting for your child
Difficulties increase during growth or stress
You sense your child is trying very hard but still struggling
Exploring further does not mean committing to treatment. It means gathering information and understanding your child more clearly.
What assessment should focus on
A respectful assessment should look at:
Developmental history
Posture and movement patterns
Reflex activity
Sensory responses
Emotional regulation
Family context and daily routines
Assessment should always involve clear explanation, collaboration, and reassurance.
A final word for parents
Noticing signs does not mean something is wrong with your child.
It means you are paying attention.
Retained primitive reflexes are one piece of a much bigger picture. Support, when needed, is about helping the nervous system feel safer and more organised, not about correcting or fixing a child.
Every child develops at their own pace.
Support should meet them where they are.
Stay connected with us on our socials (Facebook and Instagram) for more information, tips, and resources about raising healthy, happy children. If you’d like to learn more about our services or schedule an appointment, feel free to get in touch - we’d love to hear from you!