Biceps Brachii Supraglenoid tubercle (long head), Coracoid Process (short head) of the scapula Radial tuberosity of the raduis, Bicipital Aponeurosis Flexion @ elbow and shoulder jts Supination @ radioulnar jts Musculocutaneous Nerve Brachialis Distal anterior surface of humerus Ulnar tuberosity, Coranoid process of ulna Flexes forearm @ elbow jt Musculocutaneous and Radial Nerves Brachioradialis Lateral border and Distal end of humerus Superior to Styloid process of radius Flexes forearm @ elbow jt Returns radioulnar jt from sup/pron to neutral Radial Nerve Triceps Brachii (Long Head) Infraglenoid tubercle (Lateral Head) Lat/Post surface of humerus, superior to radial groove (Medial Head) Entire Post surface of humerus inferior to radial groove Olecranon of Ulna Extension of forearm @ elbow and shoulder jts Radial Nerve Anconeus Lateral Epicondyle of the humerus Olecranon and superior ulnar shaft Extends forearm @ elbow jt Radial Nerve Pronator Teres Medial Epicondyle of the Humerus and Coranoid Process of the Ulna Midlateral surface of the Radius Pronates forearm @ radioulnar jts Weak Flexion @ elbow Median Nerve Pronator Quadratus Distal portion of shaft of Ulna Distal portion of shaft of Radius Pronates forearm @ radioulnar jts Median Nerve Supinator Lateral epicondyle of humerus and Supinator Crest Lateral surface of proximal 1/3 of radius Supinates forearm @ radioulnar jts Deep Radial Nerve