Conduction block in neuralgic amyotrophy.
We describe two cases of neuralgic amyotrophy with electrophysiological evidence of conduction block across the lower trunk of the brachial plexus. Low-output impedance stimulation of the cervical spinal roots in combination with collision was used to accurately demonstrate the conduction block. Complete electrophysiological recovery of the conduction block occurred within 3 months. Early clinical and electrophysiological recovery in both patients suggests that, in some cases, demyelination may predominate early in the course of neuralgic amyotrophy.
Watson
B V
BV
Department of Clinical Neurological Sciences, London Health Sciences Centre, University Campus, 339 Windermere Road, P.O. Box 5339, London, Ontario, Canada.
Nicolle
M W
MW
Brown
J D
JD
D000208:Acute Disease; D000328:Adult; D000368:Aged; D001917:Brachial Plexus / Q000503:physiopathology; D020968:Brachial Plexus Neuritis / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology*; D003711:Demyelinating Diseases / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology; D004558:Electric Stimulation; D004568:Electrodiagnosis; D005260:Female; D006801:Humans; D008297:Male; D009333:Neck; D009431:Neural Conduction; D012075:Remission, Spontaneous; D013126:Spinal Nerve Roots / Q000503:physiopathology