Anatomy
| Origins | Long head – infraglenoid tubercle of the scapula Medial head – posterior surface of the humerus (inferior to radial groove) Lateral head – posterior surface of the humerus (superior to radial groove) |
| Insertion | Olecranon of ulna and fascia of forearm |
| Action | Elbow joint: extension of the forearm Shoulder joint: extension and adduction of the arm (long head) |
| Innervation | Radial nerve (C6-C8) |
| Blood supply | Deep brachial artery, superior ulnar collateral artery |
Stretching
Bryson Ingram R.M.T. 