Down beat nystagmus in vitamin B 12 deficiency syndrome.
A 34 years old male, presenting with progressive proximal weakness, with a neurogenic pattern on needle EMG, and a family history suggestive of an autosomal recessive disorder, was found to have additional features of myeloneuropathy and a down beat nystagmus. A low serum vitamin B12 level was found, and on vitamin B12 supplementation there was a partial clinical as well as electrophysiological recovery.
Puri
V
V
Department of Neurology, G.B. Pant Hospital, New Delhi 110 002, India. vpuri@bol.net.in
Chaudhry
N
N
Satyawani
M
M
D000328:Adult; D004576:Electromyography; D006801:Humans; D008297:Male; D018482:Muscle, Skeletal / Q000503:physiopathology; D009134:Muscular Atrophy, Spinal / Q000150:complications; D009431:Neural Conduction / Q000502:physiology; D009759:Nystagmus, Pathologic / Q000209:etiology*; D013127:Spinal Nerves / Q000503:physiopathology; D014806:Vitamin B 12 Deficiency / Q000150:complications* / Q000175:diagnosis / Q000628:therapy