Dizziness & Balance Testing

VNG is comprised of three tests that look for signs of vestibular dysfunction or neurological problems by measuring nystagmus. These tests involve recording the movement of the eyes as they follow light while the client’s head and body are in different positions.

The Dix-Hallpike test is the definitive diagnostic test for benign paroxysmal positional vertigo (BPPV). Eye movements are recorded as the head turned and reclined. This movement may make the loose crystals move within the affected semicircular canals.

VEMP testing is an electrophysiological measure used to evaluate whether the saccule and the inferior vestibular nerve are intact and functioning normally. When sound is transmitted through the earphones, electrodes record the response of the vestibular nerve.

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. It is the only test that can assess all six semicircular canals. This test involves moving the head up and down in an angular pattern while looking at a visual target.