Communication between musculocutaneous nerve and median nerve – types and incidence in Eastern Indian Population
Journal Title: Indian Journal of Basic and Applied Medical Research - Year 2018, Vol 7, Issue 3
Abstract
INTRODUCTION: Musculocutaneous nerve and median nerve, both branches from median nerve, may present with a number of variations. The most commonly noted variation is the presence of a communicating branch between the two nerves which may arise at different levels in respect to coracobrachialis muscle. METHODS: The dissection was carried out in 50 upper limbs of formalin hardened human cadavers of both the sexes in the Department of Anatomy, IPGME&R, Kolkata,West Bengal. All the measurements were taken thrice with graduated metric scale and the mean value of such observations was taken into account. OBSERVATIONS AND RESULTS: In 22% cases a communicating branch was found between the musculocutaneous nerve and median nerve. In 4% cases, there was complete fusion between the two nerves. In the remaining 74% cases, both the nerves followed their normal course and no communication was present. The mean length of the communicating branch was seen to be 6.5cm. CONCLUSION: The abnormal communication between the two nerves is very important as injury to musculocutaneous nerve or its communicating branch may lead to unexplained signs and symptoms of median nerve neuropathy as fibres of the two nerves are connected with each other. Also, the different types of anomalous communication are important for surgeons and anesthetists as the musculocutaneous nerve may be injured during arthroscopies, coracoid process grafting or shoulder surgeries.
Authors and Affiliations
Soumali Biswas
Keywords
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