Summary Biceps Brachii Origin Short head: tip of coracoid process of scapula; Long head: supraglenoid tubercle of scapula Insertion Tuberosity of radius and fascia of forearm via a bicipital aponeurosis Action Supinates and flexes forearm Innervation Musculocutaneous nerve (C5,C6) Arterial Supply Muscular branches of brachial artery