
Primitive reflexes are automatic, stereotyped movements directed from the brainstem and executed without cortical involvement. These reflexes are crucial for a newborn’s survival and development, but are typically integrated or inhibited as the nervous system matures.
Examples of Primitive Reflexes
- Moro Reflex: Often called the “startle reflex,” it’s triggered by sudden movements or loud noises.
- Palmar Grasp Reflex: Causes an infant to close their hand around anything that touches their palm.
- Asymmetrical Tonic Neck Reflex (ATNR): Also known as the “fencing posture,” it’s observed when the infant’s head turns to one side.
- Rooting Reflex: Helps the infant find the nipple for feeding when their cheek is stroked.
Why are Primitive Reflexes Important?
Understanding primitive reflexes is crucial for several reasons:
- They provide insight into an infant’s neurological development.
- Persistent reflexes beyond the typical age of integration may indicate developmental issues.
- They form the foundation for more complex motor skills and cognitive functions.
Integration of Primitive Reflexes
As a child’s brain and body develops, these reflexes should naturally integrate into more mature movement patterns and advanced neurological functioning. However, sometimes this integration process is incomplete due to stressors on the infants system. This can lead to various challenges in learning, behaviour, and physical coordination.
Some potential Signs of Unintegrated Reflexes
- Poor fine motor and gross motor skills – balance and coordination
- Difficulty with reading or writing
- Hypersensitivity of sensory systems such as sight (eg. bright lights), sound (eg. distracted or disturbed by loud noises), touch (eg. doesn’t like labels, socks or feelings of clothing)
- Emotional sensitivity or difficulty regulating emotions
- Challenges with attention and focus, sitting on the mat at school
- Thumb sucking, speech and articulation problems
- Bedwetting, toileting issues after potty training or inability to become toilet trained
How to help integrate Primitive Reflexes
Integrating retained primitive reflexes requires doing daily exercises specifically designed to properly integrate the reflex. For example, exercises need to be done at least once or twice daily over months in order to retrain the body, and for the brain to form new pathways.
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