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NEUROLOGY 1981;31:891
© 1981 American Academy of Neurology

Upbeat nystagmus changing to downbeat nystagmus with convergence

Terry A. Cox, M.D., James J. Corbett, M.D., H. Stanley Thompson, M.D. and Leslie Lennarson, C.O., C.O.T.

Neuro-ophthalmology Unit, University of Iowa Hospitals and Clinics, Iowa City, IA.

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.

Address correspondence and reprint requests to C.S. O'Brien Library, Department of Ophthalmology, University of Iowa Hospitals, Iowa City, IA 52242.

Dr. Cox was supported by a grant from the Heed Ophthalmic Foundation.

Accepted for publication October 1, 1980






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