International Journal of Health Sciences & Research (www.ijhsr.org) 410 Vol.5; Issue: 2; February 2015 International Journal of Health Sciences and Research www.ijhsr.org ISSN: 2249-9571 Case Report Unusual Origin of Supernumerary Head of Biceps Brachii - Rare Case Report Raghunath Shahaji More 1 , Royana Singh 2 , Kapil Malviya 3 , Prasenjit Bose 3 1 Assistant Professor, 2 Associate Professor, 3 Senior Resident, Department of Anatomy, Banaras Hindu University, Varanasi, India. Corresponding Author: Raghunath Shahaji More Received: 01/01/2015 Revised: 21/01/2015 Accepted: 27/01/2015 ABSTRACT Muscular variations are comparatively less when compared to vascular variations. A few muscles show additional heads of origin apart from their original heads. One such muscle which has additional heads of origin is biceps brachii. Literature reveals common occurrence of a 3rd head to biceps brachii either unilaterally or bilaterally. Knowledge of these extra heads is important in treating injuries of the muscle and in tendon reconstruction surgeries. In the present case supernumerary head on left side is observed for biceps brachii muscle in a male cadaver of approximately 60 years age. Interestingly this supernumerary head arose partly from sheath over the tendon of long head of biceps brachii. Partly fibers arose from the lateral lip of intertubercular sulcus and capsule of the shoulder joint. Fibres cross the long head of biceps brachii and runs along with the short head of biceps brachii. Addition to the normal short and long heads of biceps brachii. Because of rarity of occurrence of this supernumerary heads an attempt is made to report the case. Keywords: biceps brachii, Supernumerary Head, additional head. INTRODUCTION The biceps brachii is a large fusiform muscle in the flexor compartment of the arm. It is the only flexor of the arm crossing the shoulder joint as well as the elbow joint. Thus it acts on the both joints. Among the two classical heads, the long head runs in the intracapsular course over the humeral head and attached to the supraglenoid tubercle and adjacent portion of glenoid labrum. The short head arises from the tip of the coracoid process of scapula. The two heads soon fuse in the upper half of the arm to form the bulk of the biceps brachii muscle. The flattened tendon of biceps brachii crosses the elbow ventrally at the lower end, turns backwards and laterally to get inserted into the posterior rough part of radial tuberosity. Bicipital apponeurosis gets merged with deep fascia of forearm. [1,2] Biceps brachii is one of the well documented structures with frequent anatomical variations. Third and additional heads are often documented in the literature. Origin of third head is highly variable. It may arise either from the intertubercular sulcus of the humerus or from the shaft of the humerus near the insertion of coracobrachialis. In this case report, we report the unusual origin of the third head of biceps brachii and its clinical significance.