Vestibulo Ocular Reflex By Asad Iqbal {Isra University)

1. Vestibulo-Ocular Reflex
Asad Iqbal

2.  VESTIBULO OCCULAR REFLEX
 It’s conjugate ocular movement opposite
to head movement and it’s stimulated by
vestibular system

3.  When camera is moving the image will be
blurre and why not with your eyes when
you move head..? That’s VOR mechanism

4.  VOR is reflex where Activation of
vestibular system causes eye movements
 This Reflex function stabilize image on
retina
 During head movements producing eyes
movements in opposite direction to head
movement thus preservering(orginal
state) on the central visual field

5.  Vestibular apartus has sensory system
(semicircular canals) which is located in
inner layer of ear which can detect the
rotational movement
 Whenever head move the motion sensor
activited and vestibular stimulate the
nerves which control extra ocular muscle.

6.  E.g if head is moving right 30 degree so
eye should move 30 degree left to focus
the image on fovea

7.  HEAD THRUST
 We give a target to patient to fix eye and
we move the patient head to check VOR
where eyes will be moving opposite
direction to fix the image on fovea.