Vertical optokinetic nystagmus. The normal response.
D001921:Brain; D001927:Brain Diseases; D006801:Humans; D009462:Neurology / Q000175:diagnosis*; D017120:Nystagmus, Optokinetic; D009759:Nystagmus, Pathologic; D015835:Ocular Motility Disorders
BRAIN/diseases; NEUROLOGY/diagnosis; NYSTAGMUS