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A case of ulnar nerve section at the elbow alleviated by Martin-Gruber communicating branch. Diagnostic
J M Pardal-Fernandez1, A Grande-Martin1, B Godes-Medrano1
1Department of Clinical Neurophysiology, University General Hospital, C/Hnos. Falcó, S/N, 02006 Albacete, Spain.
Abstract:
Martin-Gruber communicating branch may be a confounding factor in the diagnosis of ulnar neuropathy at the elbow. It may also lead to a surprising level of motor function conservation despite evident neuropathy. We present a patient with ulnar nerve section at the elbow who underwent early treatment by nerve suture. At 7 months, function was good, despite sonographic findings of neurotmesis at the elbow. Electroneurography revealed Martin-Gruber communicating branch. This type of communicating branch can be associated with functional conservation despite ulnar nerve section. Electrophysiological and ultrasound findings can be highly contributive in defining these conditions.
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