title: Upbeat nystagmus changing to downbeat nystagmus with convergence.
abstract: A 35-year-old woman developed upbeating nystagmus while recovering from presumed Wernicke-Korsakoff syndrome. The upbeating nystagmus changed to downbeating nystagmus with convergence. The slow-phase velocity of the downbeating nystagmus varied with the convergence effort. We believe that this unusual nystagmus pattern implies convergence input to the supranuclear centers for vertical gaze.
mesh_terms: D000328:Adult; D000425:Alcohol Amnestic Disorder / Q000150:complications; D002150:Caloric Tests; D005133:Eye Movements; D005260:Female; D006801:Humans; D009759:Nystagmus, Pathologic / Q000150:complications / Q000175:diagnosis*