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Matthew J. Thurtell, MBBS, FRACP
August 2014, Volume 20, Issue 4, Neuro-ophthalmology;
This video shows a 48-year-old man with upbeat and gaze-evoked nystagmus caused by Wernicke encephalopathy following gastric bypass surgery. The upbeat nystagmus is atypical in that it is less prominent with upward gaze. Note the gaze-evoked nystagmus on lateral gaze.
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