Ulnar-median and median-ulnar anastomoses in the forearm: a patient report.
Reports of an ulnar-median anastomosis in the forearm (UMAF) are rare and its existence has been questioned. A patient with clinical and electrophysiologic evidence of ulnar neuropathy at the elbow (UNE) had unexpected fibrillations in the abductor pollicis brevis muscle (APB). Additional nerve conduction studies suggested both ulnar-median and median-ulnar anastomoses in the forearm. The unexpected finding of APB fibrillations in a patient with UNE should raise the possibility of the rare UMAF.
Department of Neurology, Beth Israel Medical Center, New York, New York, USA. SScelsa@BethIsraelNY.Org
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D000328:Adult; D004550:Elbow / Q000294:innervation; D004558:Electric Stimulation; D004576:Electromyography; D005542:Forearm / Q000294:innervation*; D006801:Humans; D008297:Male; D008475:Median Nerve / Q000002:abnormalities* / Q000503:physiopathology; D009431:Neural Conduction / Q000502:physiology; D014459:Ulnar Nerve / Q000002:abnormalities* / Q000503:physiopathology; D020424:Ulnar Neuropathies / Q000175:diagnosis / Q000503:physiopathology