Muscle Attachments
| Muscle | Direction | Attachment |
| Triceps brachii muscle | Insertion | posterior part of superior surface of Olecranon process (via common tendon) |
| Anconeus muscle | Insertion | olecranon process (lateral aspect) |
| Brachialis muscle | Insertion | anterior surface of the coronoid process of the ulna |
| Pronator teres muscle | Origin | medial surface on middle portion of coronoid process (also shares origin with medial epicondyle of the humerus) |
| Flexor carpi ulnaris muscle | Origin | olecranon process and posterior surface of ulna (also shares origin with medial epicondyle of the humerus) |
| Flexor digitorum superficialis muscle | Origin | coronoid process (also shares origin with medial epicondyle of the humerus and shaft of the radius) |
| Flexor digitorum profundus muscle | Origin | coronoid process, anteromedial surface of ulna (also shares origin with the interosseous membrane) |
| Pronator quadratus muscle | Origin | distal portion of anterior ulnar shaft |
| Extensor carpi ulnaris muscle | Origin | posterior border of ulna (also shares origin with lateral epicondyle of the humerus) |
| Supinator muscle | Origin | proximal ulna (also shares origin with lateral epicondyle of the humerus) |
| Abductor pollicis longus muscle | Origin | posterior surface of ulna (also shares origin with the posterior surface of the radius bone) |
| Extensor pollicis longus muscle | Origin | dorsal shaft of ulna (also shares origin with the dorsal shaft of the radius and the interosseous membrane) |
| Extensor pollicis brevis muscle | Origin | dorsal shaft of ulna (also shares origin with the dorsal shaft of the radius and the interosseous membrane) |
| Extensor indicis muscle | Origin | posterior surface of distal ulna (also shares origin with the interosseous membrane) |
Read more about this topic: Ulna