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Apparent conduction block in patients with ulnar neuropathy at the elbow and proximal Martin–Gruber anastomosis

✍ Scribed by Charles H. Whitaker; Kevin J. Felice

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
116 KB
Volume
30
Category
Article
ISSN
0148-639X

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✦ Synopsis

Abstract

A Martin–Gruber anastomosis (MGA) commonly results in an abnormal decline in amplitude across the forearm segment when ulnar motor nerve conduction studies are performed. A recent report described a proximal MGA resembling partial conduction block in a patient with ulnar neuropathy at the elbow (UNE). As a result, we screened patients with similar findings. We detected a proximal MGA in three patients over a period of 2 years, which suggests that this may be an under‐recognized anomaly. We conclude that a proximal MGA must be excluded in all cases of UNE showing apparent partial conduction block across the elbow segment. Muscle Nerve, 2004

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✍ Connie Marras; Gyl Midroni 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 86 KB 👁 2 views

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 ver