Lesion distribution among 281 patients with sporadic neuralgic amyotrophy

Introduction The muscles commonly affected by neuralgic amyotrophy (NA) are well known, but the location of the responsible lesions is less clear (plexus versus extraplexus). Methods We report the lesion locations in 281 NA patients as determined by extensive electrodiagnostic (EDX) testing. Results Our 281 patients had 322 bouts of NA, 57 of which were bilateral, for a total of 379 assessable events. A single nerve was involved in 174 (46%),...