title: Primary position upbeat nystagmus. Localizing value.
mesh_terms: D000328:Adult; D001921:Brain / Q000503:physiopathology; D001933:Brain Stem / Q000503:physiopathology; D002531:Cerebellum / Q000503:physiopathology; D005260:Female; D006801:Humans; D009759:Nystagmus, Pathologic / Q000503:physiopathology*