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Rehabilitation Practice and Science

Translated Title

正中神經到尺神經神經吻合與手內肌群異常支配之肌電診斷

Abstract

Communication between the median and ulnar nerves is a common anomaly in the forearm (Martin-Gruber anastomosis, MGA). The knowledge of these anastomoses and the resulting anomalous innervation patterns is of crucial importance to the clinicians and electromyographers in the performance of nerve conduction and electromyographic studies in normal patients and those with peripheral nerve lesions. One hundred forearms (fifty cases) were examined for median-to-ulnar or ulnar-to-median nerve anastomoses using surface electrodes. We found a motor median-to-ulnar nerve anastomosis occurring in 12% of forearms studied. The incidence of innervation of the different intrinsic hand muscles: abductor pollicis brevis (APB) 17%; abductor digiti quinti (ADQ) 17%; first dorsal interosseus (FDI) 92%. In conclusion, the incidence of MGA in our study corresponds well with the results of other authors. No case of motor ulnar-to-median nerve anastomosis in the forearm could be found. Electromyographers and clinicians need to consider the possibility of a MGA when the hand is evaluated for nerve dysfunction.

Language

English

First Page

149

Last Page

154

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