Primitive-reflex concepts can sometimes provide a hypothesis about coordination, balance or a movement skill that deserves practice.
For an adult training client, the useful question is not whether one test reveals a hidden developmental diagnosis. It is whether a safe exercise improves a clearly defined skill and whether that improvement transfers to training, sport or daily activity.
This article explains what primitive reflexes are, where adult evidence remains limited and how selected concepts may inform a measured strength-and-movement trial.
What are primitive reflexes?
Primitive reflexes are automatic motor responses that appear during fetal development or infancy. Examples include the rooting, sucking, Moro, palmar-grasp and asymmetrical tonic neck reflexes.
These responses support early survival and development. As the nervous system matures, voluntary motor control and postural reactions increasingly replace or inhibit many of them.
Their clinical meaning depends heavily on:
- age
- neurological history
- the exact reflex
- how it is tested
- whether other neurological signs are present
- whether the finding affects function
Does a movement test prove that an adult has a retained reflex?
No single informal movement observation can establish that conclusion.
An adult may move the trunk when the head turns because of balance strategy, stiffness, instruction, apprehension, coordination, pain or normal variation. That response is not automatically proof of an unintegrated infant reflex.
Primitive-reflex testing has also lacked consistent standardization across many non-medical programs. Different tests and scoring systems may not be interchangeable.
What can primitive reflexes mean in adults?
In medical neurology, the reappearance of selected primitive reflexes may be described as frontal release signs. Multiple findings, especially alongside cognitive, motor or other neurological changes, may warrant assessment for central nervous system disease.
Some reflex-like responses can also occur in people without a diagnosed neurological disorder. This is why one isolated observation should not be used to diagnose a condition.
The correct interpretation belongs within a proper neurological examination when pathology is suspected.
What about ADHD, anxiety and learning problems?
Some observational research has found associations between selected reflex scores and motor or behavioural measures in children. A systematic review and meta-analysis reported an association between ADHD and ATNR or STNR measures in children.
Association does not establish that a retained reflex causes ADHD. It also does not show that reflex exercises treat ADHD.
Evidence from children cannot automatically be transferred to adults, and an RMT or strength coach should not use a reflex screen to diagnose:
- ADHD
- autism
- anxiety or depression
- dyslexia
- learning disorders
- sensory-processing disorders
- neurological disease
These concerns require appropriately qualified professionals.
Does reflex-integration exercise work?
Evidence for reflex-integration programs is limited and condition-specific.
The American Occupational Therapy Association advises against using reflex-integration programs for delayed primary motor reflexes unless the finding is clearly connected to an occupational outcome. It recommends focusing intervention on participation and performance rather than trying to change a reflex score for its own sake.
That is a useful principle for adults as well.
If a movement exercise improves balance, coordination or training tolerance, the functional improvement can be valuable. It does not prove that the exercise permanently integrated a primitive reflex or treated a neurological condition.
Can a reflex-informed movement still be useful?
Possibly.
A movement drawn from developmental or reflex-based models may still challenge coordination, head and limb dissociation, balance or body awareness. An exercise can be useful because of what the person practises, even when the proposed "reflex integration" mechanism has not been established.
The safest description is:
This movement may be worth testing for this functional goal.
The stronger claim:
This symptom proves a retained reflex, and this exercise will integrate it,
is not supported by the same evidence.
Focus on the skill being trained
A developmental or reflex-informed exercise may contain useful training demands even when the reflex-integration explanation is uncertain.
The exercise may require:
- head and limb dissociation
- contralateral coordination
- balance
- trunk control
- visual tracking
- rhythm
- attention under movement
Those are observable skills. They can be trained and reassessed without diagnosing a retained infant reflex.
This creates a cleaner explanation:
We are using this movement to practise a specific coordination demand and will check whether it transfers to your goal.
That is more defensible than:
This exercise will integrate a primitive reflex and reorganize your brain.
If the exercise improves balance, coordination or sport practice, it may be worth keeping. If only the proprietary reflex score changes while meaningful function does not, the exercise has not demonstrated enough value.
What would a measured trial look like?
A reflex-informed trial should:
- Begin with a specific adult movement or performance problem.
- Screen for neurological findings requiring referral.
- Select a safe movement within my competence and scope.
- Measure a relevant task before and after.
- Track whether any improvement persists and transfers to daily activity or training.
- Stop or change direction when only the reflex score changes but function does not.
This keeps the potentially useful movement while avoiding a diagnosis or promise that the nervous system has been permanently reorganized.
Why left-brain and right-brain dominance should not guide treatment
The idea that a person has a globally dominant left or right hemisphere that determines personality and learning style is a neuromyth.
Certain functions are lateralized, but functional brain-imaging research has not supported dividing people into left-brained and right-brained types.
Lee Strength does not use a brain-dominance self-test to diagnose movement, behaviour or neurological function.
How primitive-reflex education may fit at Lee Strength
I have completed permanent Reflexes & Brain Development / Primitive Reflexes continuing education.
The course may provide historical and developmental context for observing movement and selecting a testable coordination exercise. It does not qualify me to diagnose neurological or developmental disorders, and Lee Strength does not market reflex integration as a proven treatment for broad medical, behavioural or learning conditions.
For an adult whose goal involves movement or performance, the practical assessment should focus on measurable function:
- balance
- coordination
- strength
- movement tolerance
- sport or work demands
- response to an exercise
- progress over time
If an unusual neurological response is suspected, referral is more appropriate than assigning a reflex-based explanation.
When medical assessment takes priority
Seek appropriate medical care for:
- new or progressive weakness
- loss of coordination
- new speech or swallowing difficulty
- facial weakness
- altered consciousness
- major changes in cognition or behaviour
- seizure
- severe or worsening headache
- new gait disturbance
- new bowel or bladder dysfunction
- other sudden neurological symptoms
These findings should not be treated as a posture or reflex-integration problem.
A reasonable standard
A movement concept earns a place when it helps make a safer or more useful decision.
It should not be used to:
- give a neurological diagnosis
- explain every symptom
- promise brain reorganization
- claim to treat ADHD, autism, anxiety or learning disorders
- replace medical, neurological, psychological, pediatric or occupational assessment
- sell a long protocol without functional progress
The outcome that matters is what the person can do, not whether a proprietary checklist produces a more desirable label.