Isolated brachialis wasting: an unusual presentation of neuralgic amyotrophy.
Although neuralgic amyotrophy can selectively affect discrete components of the brachial plexus including individual peripheral nerves, involvement of an individual nerve fascicle is rare. Discrete fascicular musculocutaneous neuropathy as a manifestation of neuralgic amyotrophy has not previously been reported to our knowledge. We report two cases of otherwise typical neuralgic amyotrophy with isolated brachialis muscle wasting. Abnormal spontaneous activity, motor unit remodeling, or both, was observed only in the brachialis muscle. Lateral antebrachial cutaneous nerve conduction studies were normal. These cases serve to broaden the spectrum of the clinical presentation 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 N6A 5A5, Canada.
Rose-Innes
A
A
Engstrom
J W
JW
Brown
J D
JD
D000328:Adult; D020968:Brachial Plexus Neuritis / Q000473:pathology*; D020516:Brachial Plexus Neuropathies / Q000473:pathology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000294:innervation / Q000473:pathology*; D009133:Muscular Atrophy / Q000473:pathology; D009431:Neural Conduction