2014 Inner Ear Physiology

Electro-oculogram (EOG)

  • also called electronystagmography (ENG)

  • VOR is fast: 3 neuron arc

  • electrical potentials recorded from the surface of the eye
    • surface of cornea is electrically positive relative to the back of the eye
    • by convention, movement to the right is up

  • contraction of the extraocular muscles, or video monitoring of eye function are alternative methods for recording eye position

  • because of the VOR, in a normal person moving head back and forth:
    • the eyes maintain an equal but opposite motion (very little lag time: <10 ms)
    • resulting in no change in the direction of gaze
Normal EOG
Email: Dr. Janet Fitzakerley | ©2014 University of Minnesota Medical School Duluth | Last modified: 15-feb-14 9:04 PM