New tests identify patterns of vestibular loss

For the last century, the caloric test of horizontal canal function has been the standard test of vestibular function and, as a result, many deficits of peripheral and central vestibular function have gone undetected. Clinicians have puzzled about patients showing what are manifestly vestibular symptoms at the bedside examination, in whom the calorics were within the normal range. The introduction of the new vestibular tests – video head impulse test of all six semicircular canals (reviewed in (Halmagyi et al., 2017) and vestibular evoked myogenic potentials (VEMP) testing of utricular and saccular function (reviewed in (Curthoys et al., 2017) has solved this puzzle.

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