Abstract
Thirty seven patients of benign paroxysmal positional vertigo (BPPV) secondary to ear disease, whose diseased side was definite, were investigated clinically.The age of the patients ranged from 37 to 77 years.In 21 patents vertigo occurred in the critical position and in 19 of these the position was the same side as the disease. In all those with acute auditory or vestibular disturbance, unilateral canal function disturbance or unilateral sensory hearing disturbance, the critical position was the same as the side of the disease.Thirty one paients had positional nystagmus and in 19 of these the nystagmus was toward the affected side. In all patients with unilateral sensory hearing disturbance the positional nystagmus was toward the side of the disease, but of those with acute auditory or vestibular disturbance or chronic otitis media, only half had nystagmus toward the diseased side.Twenty one patients had positioning nystagmus when they moved from a sitting to a head hanging position and only seven of these had nystagmus toward the side of the disease. All of those with unilateral sensory hearing disturbance had nystagmus toward the non-affected side.
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