9. Head impulse test :
-It is a bed side technique used to
diagnose reduction in vestibular
function .
-It’s sensitivity is low , as it needs
more than 50% canal paresis to be
positive
-patients with vestibular hypo
function have a catch up saccade
after the head is thrust to ward the
affected side .
11. Head shaking test :
-purpose : identify vestibular
dysfunction
-It is highly sensitive in cases of
vestibular hypofunction.
-Head-shaking nystagmus is an
indication of asymmetrical
vestibular function
12. Head shaking test :
Bi lateral vestibular loss : No
nystagmus .
Unilateral vestibular neuritis or
acoustic neuroma : nystagmus
usually beating towards the better
ear which decays for 30 seconds
(first phase nystagmus)
13. This test involves
rotating the subject
in a darkened booth
while eye position
is monitored to
assess the VOR.
Rotationary chair
test
