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Primitive Reflexes In Infancy

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