Mechanism behind VHit…
VOR Vestibular Ocular Reflex
Acts to stabilise gaze during head movements.
Vhit measure saccades used by the eyes to keep focus on the fixed object.
What is a normal test result?
Considered to be a gain reading of 1.
less than 0.8 indicates vestibular weakness.
Clinical applications of Vhit are…
To differentiate peripheral from central causes of nystagmus.
Patriculalry used in vestibular neuritis