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CASE REPORT
Year : 2018  |  Volume : 17  |  Issue : 1  |  Page : 41-44

A unique variation of musculocutaneous nerve and median nerve and its clinical significance


Department of Anatomy, Touro College of Osteopathic Medicine, New York, NY, USA

Correspondence Address:
Dr. Sumathilatha Sakthi-Velavan
Department of Biomedical Sciences, Marian University College of Osteopathic Medicine, 3200 Cold Spring Rd., Indianapolis, IN 46222
USA
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jeca.jeca_10_18

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The musculocutaneous nerve (MCN) and median nerve (MN) are branches of the brachial plexus that innervates the anterior compartment of the upper limb. Although the nerves have different course and distribution, communication between median and MCNs may result from an altered course of the nerve fibers during their development. Rare patterns of communication were found bilaterally in a male cadaver. The right MCN was fused with the MN for a length of 3 cm. The fused intermediate segment supplied biceps brachii, while the unfused segments supplied the other anterior arm muscles. The variation is a unique type of transposed nerve fibers supplying the brachial flexors and is a deviant of the defined patterns of communications. On the left side, a communication twig coursed anteriorly to the axillary artery from MCN to the MN. The surgical, neurophysiological, and embryological relevance of such variations is of great clinical significance.


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