VARIATION IN THE INSERTION OF BICEPS BRACHII MUSCLE: A CASE REPORT

Abstract

Introduction: Biceps brachii is a large, fusiform muscle of upper limb having two heads of origin; the short head arising by a thick flattened tendon from the apex of the coracoid process Paper Submission Dateand the long head from supraglenoid tubercle of the scapula. The flattened tendon at the lower end rotates as it passes through the cubital fossa to its insertion into the posterior border of tuberosity of the radius. Case History: During routine cadaveric dissection of undergraduate teaching program in SRMS IMS, Bareilly,we found rare variation in the insertion of biceps. We observed unilateral Paper Publication Date variation in the insertion of biceps muscle. The biceps tendon at its insertion was divided into July 2017 three distinct parts. Main tendon of long head inserts on radial tuberosity. This tendon of long head sends musculotendinous slip to pronator teres muscle. The short head sends DOI musculotendinous slip to flexor carpi radialis and its tendon does not insert on radial tuberosity despite formation of common belly with long head. The origin of muscle is normal and from two heads short head and long head. The muscle is supplied by musculocutaneous nerve. Conclusion: The triple tendon insertion may allow an element of independent function of each portion of the biceps, and during repair of an avulsion, the surgeon should ensure correct orientation of both tendon components.