Tonic-neck reflex

In infants a postural reflex, which is characterized by limb extension to the side to which the head is turned and limb flexion in the opposite direction.


The ipsilateral extension and contralateral flexion of the supine infant’s extremities when the head is turned to one side. This normal newborn reflex may not be evident immediately after birth; however, once it appears, it persists until about the third postnatal month.


 


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