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Musculoskeletal Anat
Forearm @ Elbow and Radioulnar joint muscles, origins, insertions, and actions
Muscle | Origin | Insertion | Action |
---|---|---|---|
Bradioradialis | Humerus | Styloid process of radius | Forearm flexion @ elbow |
Triceps brachii *long head *lateral head *medial head | Glenoid (infraglenoid tubercle - long head) Posterior shaft of humerus (lateral & medial head) | Olecranon of ulna | Arm extension @ shoulder (long) Forearm extension @ elbow |
Supinator | Lateral epicondyle of humerus | Proximal shaft of radius | Forearm/hand supination @ radioulnar joints |
Pronator teres (located in anterior forearm) | Medial epicondyle of humerus | Lateral surface of midshaft of radius | Forearm/hand pronation @ radioulnar joints |
Pronator quadratus (located in anterior forearm) | Distal ulna | Distal radius | Forearm/hand pronation @ radioulnar joints |
Biceps brachii *long head *short head | Glenoid (supraglenoid tubercle - long head) Coracoid process of scapula (short head) | Radial tuberosity of radius | Forearm flexion @ elbow Arm flexion @ shoulder (long head) Forearm/hand supination @ radioulnar joints |
Brachialis | Humerus | Coronoid process of ulna | Forearm flexion @ elbow |