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Category: Volume 09 Issue 11 November 2021
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Title: A Cadaveric Study on the Anatomic Variations of the Musculocutaneous Nerve in the Infraclavicular Part of the Brachial Plexus

Authors: Dr Vidhya B, Dr Umarani S, Dr Ananthi V, Dr Santhakumar R, Dr Sujitha Jacinth J, Dr Karthikeyan A

 DOI: https://dx.doi.org/10.18535/jmscr/v9i11.28

Abstract

Brachial plexus begins from ventral rami of C5 to T1 segment of spinal cord. Brachial plexus has 3 cords-medial, lateral & posterior. The Musculocutaneous nerve arises from the lateral cord of the brachial plexus, passes inferolaterally and then pierces through the coracobrachialis8and it descends between the biceps and the brachialis, sending branches to both and continues as the lateral cutaneous nerve of the forearm6. The musculocutaneous nerve is responsible for the innervation of the flexor musculature of the elbow and the skin sensitivity from elbow to wrist15. Musculocutaneous nerve shows wide variations which can have clinical and surgical importance8. Present variation was observed during routine dissection on cadavers in the department of anatomy, Rajah muthiah medical college, Chidambaram. In the present study out of 50 upper extremities, 4% of musculocutaneous nerve did not pierce the coracobrachialis muscle on the right side and 4% of musculocutaneous nerve did not pierce the coracobrachialis muscle bilaterally and gave separate branch. 2% had a communicating nerve between the medial nerve and the musculocutaneous nerve after piercing coarcobrachial’s muscle.2% had no musculocutaneous nerve.

References

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Corresponding Author

Dr Karthikeyan A

PG Student, Department of Anatomy, Rajah Muthiah Medical College and Hospital, Chidambaram