Caloric vertical nystagmus: the vertical semicircular canal in caloric testing.
Vertical nystagmus elicited by caloric testing does not necessarily mean there is central pathology. In a patient with confirmed peripheral vestibular disease, caloric stimulation produced an intense vertical nystagmus, which showed all the features of a caloric nystagmus. The patient had bilateral mastoid cavities, allowing easy stimulation of the posterior semicircular canal, using air. At the same time, a unilateral horizontal semicircular canal functional loss was observed, raising the possibility of dissociated canal dysfunction.
D000328:Adult; D001299:Audiometry; D002150:Caloric Tests; D004584:Electronystagmography; D005260:Female; D006801:Humans; D009760:Nystagmus, Physiologic; D012027:Reflex, Vestibulo-Ocular; D012665:Semicircular Canals / Q000503:physiopathology*; D014724:Vestibular Function Tests