An unusual supernuemerary third head of biceps brachii muscle in malayasian male cadaver- a case report.

Abstract

Abstract--Biceps brachii muscle supernumerary head have been studied regarding their origin, insertion, size, innervations, and racial differences. The most common variation is its supernumerary head. During routine dissection in the department of anatomy. we dissected Malaysian male cadaver, the variation of unusual third supernumerary head were found in the left upper arm, apart from medial bicipital aponeurosis, lateral bicipital aponeurosis was also seen. This unusual third supernumerary head innervated with musculocutaneous nerve. Review of the medical literature shows that the occurrence of infrolateral supernumerary third head of Biceps brachii muscle is no where in Malaysians. Knowledge of occurrence of infrolateral supernumerary third head of Biceps brachii muscle may become significant for the clinicians for selective motor nerve blocks, to treat the nerve impairments and for the surgeons performing arm surgeries.Keywords--Biceps brachii, supernumerary third head, Medial bicipital aponeurosis, Lateral bicepital aponeurosis, Musculo cutaneous nerve.