Bassett Collection Large Image - Lane Medical Library, Stanford University Medical Center

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Dorsal aspect of right forearm

Anconeus muscle

A lateral expansion of the tendon of insertion of the triceps muscle which covered the anconeus has been partially cut away.

1 .	Lateral epicondyle of humerus
2 .	Triceps brachii muscle (tendon of insertion)
3 .	Olecranon
4 .	Anconeus muscle
5 .	Recurrent interosseous artery
6 .	Abductor pollicis longus muscle
7 .	Extensor carpi ulnaris muscle
8 .	Ulna (covered by periosteum)
9 .	Brachialis muscle
10 .	Extensor carpi radialis longus muscle
11 .	Branch of recurrent radial artery
12 .	Common extensor digitorum muscle
13 .	Extensor carpi radialis brevis muscle