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Primitive Reflexes

Primitive Reflexes In Infancy

ReflexDescription Age Reflex Disappears
Root When infant's cheek is stroked, the infant turns to that side, searching with mouth. 3 Months
Suck Reflexive sucking when nipple or finger is placed inside infant's mouth. 2-5 Months
Moro With sudden extension of the head, the arms abduct and move upward and the hands form a "C." 4 Months
Asymmetric Tonic Neck While laying supine, extremities are extended on the side of the body to which the head is turned and the opposite extremities are flexed (a.k.a. "fencing" position). 4 Months
Palmer Grasp Infant reflexively grasps when palm is touched. 4-6 Months
Plantar Grasp Infant reflexively grasps with bottom of foot when pressure is applied to plantar surface. 9 Months
Babinski Stroking along the lateral aspect of the sole and across the plantar surface results in fanning and hyper-extension of toes. 12 Months
Step With one foot on a flat surface, the infant puts the other foot down as if to "step." 4-8 Weeks
Created by: SMCooper630