Once your baby strikes this position, you'll see why it's also called the "fencing reflex." (Experts call it the asymmetrical tonic neck reflex.) When your baby is lying on their back, if you turn ...
The STNR is a primitive reflex that is characterized by upper extremity (UE) extension and lower extremity (LE) flexion with neck extension, and by UE flexion and LE extension with neck flexion.