What is VHIT test for?
The video head impulse test is an ear-specific test that detects disorders of the vestibulo-ocular reflex and identifies which ear is affected in cases of peripheral vestibular loss.
What is VHIT gain?
Gains of the VHIT test — “all over the place” in “all comers”. One would EXPECT that the VHIT gain in normal people should have a gain 1.0, and there should be few if any saccades during or just after the head thrust.
What is video head impulse?
Video head impulse test (vHIT) is a new testing which able to identify the overt and covert saccades and study the gain of vestibulo-ocular reflex (VOR) of each semicircular canal. The aim of this study is to review the clinical use of vHIT in patients with vestibular disorders in different diseases.
What is a VNT test?
VNG testing is a series of tests designed to document a persons ability to follow visual objects with their eyes and how well the eyes respond to information from the vestibular system. This test also addresses the functionality of each ear and if a vestibular deficit may be the cause of a dizziness or balance problem.
What does a positive head impulse test mean?
The presence of a compensatory, re-fixating saccade back to the examiner’s nose when the head stops moving is a positive clinical sign indicative of peripheral vestibular weakness (vestibular hypofunction) on side to which the head was rotated.
What is bilateral hit?
Bilaterally abnormal HITs indicate that a patient has a large unilateral CPA tumor. The abnormal HITs in the contralesional direction may be explained either by adaptation or by compression and resultant dysfunction of the cerebellar and brainstem structures.
What is a positive head impulse test?
What is Vemp testing?
→ Vestibular evoked myogenic potential (VEMP) testing is a relatively new vestibular testing technique that determines vestibular function by applying a repetitive sound stimulus to one ear and then averaging the reaction of the muscle activity in response to each sound click or pulse.
What is Halmagyi head thrust?
The Halmagyi-Curthoys test is a clinical neurological examination that is used to assess whether or not the vestibulo-ocular reflex is intact in a patient. It is sometimes also called the Halmagyi head thrust maneuver, or the rapid head impulse test.