Downbeat nystagmus provoked by lateral gaze and convergence
Creator
Daniel R. Gold, DO
Affiliation
(DRG) Departments of Neurology, Ophthalmology, Neurosurgery, Otolaryngology - Head & Neck Surgery, Emergency Medicine, and Medicine, The Johns Hopkins School of Medicine, Baltimore, Maryland
This is a patient with cerebellar ataxia but without spontaneous downbeat nystagmus (DBN). However, DBN can clearly be seen with convergence and in lateral gaze (along with gaze-evoked nystagmus, which in addition to DBN causes an oblique or diagonally oriented nystagmus referred to as "side pocket nystagmus").
