Biceps Brachii with Third Head: A Case Report

The biceps brachii is known to show variations in the number of heads. Unilateral three headed biceps brachii was found in the right upper limb of adult cadaver. The muscle was innervated by a branch from musculocutaneous nerve. Accessory head may provide additional strength to the biceps during supination of the forearm and elbow flexion. Understanding of such variations is helpful in preoperative diagnosis and surgery of upper limb.