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Vestibular neuritis (VN) causes acute vertigo and results from acute loss of function of the superior vestibular nerve due to viral infection. The best test for VN, the caloric test, assesses the input for the horizontal semicircular canal (SCC). But there are other structures of the inner ear that can now be tested.
These researchers prospectively evaluated 51 consecutive patients with unilateral VN using a battery of tests of otolith and of SCC function to determine the involvement of the otoliths (utricle and saccule) and to identify predictors of outcome. Patients were seen within 7 days of onset of acute vertigo with involvement of horizontal SCC based on caloric test but no associated hearing loss, no previous neuro-otologic disorders,…