When most people hear the term primitive reflexes, they’ve never heard of them before.
But these early reflexes play an important role in a baby’s development. They help infants survive, move, and interact with the world during the first months of life. As the brain matures, these reflexes are expected to become integrated, making way for more advanced movement patterns and skills.
Sometimes, however, those reflexes don’t fully integrate.
When that happens, children may continue relying on early movement patterns long after they should have disappeared. Depending on the child, this can affect posture, coordination, attention, balance, learning, and everyday activities.
What Are Primitive Reflexes?
Primitive reflexes are automatic movements that are present at birth or shortly afterward. They are controlled by the lower parts of the nervous system and help babies develop important motor and sensory skills.
Some of the better-known primitive reflexes include:
- Moro Reflex
- ATNR (Asymmetrical Tonic Neck Reflex)
- STNR (Symmetrical Tonic Neck Reflex)
- Spinal Galant Reflex
- Rooting Reflex
- Palmar Grasp Reflex
- TLR (Tonic Labyrinthine Reflex)
As the brain develops, these reflexes are typically replaced by more mature movement patterns.
What Happens When Primitive Reflexes Are Retained?
A retained primitive reflex doesn’t automatically mean a child has a diagnosis or developmental disorder. However, it may be one piece of the puzzle for some children.
Some possible signs include:
- Poor balance or coordination
- Difficulty sitting still
- Frequent fidgeting
- Clumsiness
- Motion sensitivity
- Poor posture
- Challenges with handwriting
- Difficulty tracking words while reading
- Trouble crossing the midline
- Delayed motor skills
- Difficulty with attention or self-regulation
Every child is different, and these signs can have many possible causes. That’s why a comprehensive evaluation is important.
Why Do Primitive Reflexes Matter?
The brain develops in layers.
Higher-level skills like attention, reading, balance, emotional regulation, and coordination are built on earlier developmental foundations.
If a child is still relying on immature movement patterns, the brain may have to work harder during everyday activities.
This doesn’t mean the brain can’t adapt—many children become excellent compensators—but it may help explain why some skills continue to feel more difficult than expected.
How Are Primitive Reflexes Evaluated?
At Heal Thyself Institute, we include primitive reflexes as one part of a broader neurological assessment.
Rather than focusing on one symptom, we evaluate how different parts of the nervous system are working together.
If retained primitive reflexes appear to be contributing to a child’s challenges, they may become one component of an individualized treatment plan alongside other therapies based on that child’s specific needs and goals.
Can Primitive Reflexes Improve?
The nervous system continues to adapt throughout life.
Depending on the individual, treatment may include movement-based activities, balance exercises, coordination work, visual activities, sensory input, or other therapies designed to support overall brain function.
Every treatment plan is individualized because every brain is different.
Final Thoughts
Primitive reflexes are just one piece of a child’s development—but they’re an important one.
Understanding how these early movement patterns influence later skills can provide valuable insight into challenges with movement, learning, attention, and coordination.
Rather than asking only “What is my child struggling with?” we also ask “Why might they be struggling?”
That’s often where meaningful progress begins.
