Reflexes: Abnormal Findings

Pathological reflexes

Video: frontal release signs- snout, root, palmomental

Description: These patterned behavior reflexes appear when there is damage to the frontal lobes, which normally inhibits these primitive reflexes.

1. A snout reflex occurs when a tongue blade is pressed on the lips and there is pouting of the lips.

2. A root reflex occurs when gently stroking the lateral upper lip causes the mouth to moves toward the stimuli.

3. A palmomental reflex occurs when stroking the palm of the hand causes the ipsilateral mentalis muscle of the lower lip to contract.

Clck the play button to watch the video

Back to Index |   Previous page   

 

© 2009 Michigan State University Board of Trustees. MSU in an equal-opportunity institution. East Lansing, MI 48824
Site Design by  B-CLR