Proximal Martin–Gruber anastomosis mimicking ulnar neuropathy at the elbow
✍ Scribed by Connie Marras; Gyl Midroni
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 86 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0148-639X
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✦ Synopsis
We present a case of Martin-Gruber anastomosis (MGA) mimicking conduction block between the above-and below-elbow sites of ulnar nerve stimulation. We review the anatomical and electrophysiological literature on this subject and discuss its clinical implications. The potential for a MGA to occur very proximally in the forearm and thus mimic ulnar neuropathy at the elbow is underrecognized. We recommend that a check for MGA be performed on all patients with an apparent conduction block at the elbow, and suggest that 3 cm distal to the medial epicondyle may be an optimal below-elbow ulnar nerve stimulation site.