Cranial Nerve Exam: Abnormal Examples: Cranial Nerve 5 - Motor

The first patient shown has weakness of the pterygoids and the jaw deviates towards the side of the weakness. The second patient shown has a positive jaw jerk which indicates an upper motor lesion affecting the 5th cranial nerve. Video courtesy of Alejandro Stern, Stern Foundation. NeuroLogic Exam has been supported by a grant from the Slice of Life Development Fund at the University of Utah, the Department of Pediatrics and the Office of Education at the University of Nebraska Medical Center. Viewing the video requires installation of the free QuickTime Plug-in.