Anconeus
| Pronuncation | an-COH-nee-us |
| Derivation | Ancon, meaning corner or elbow. |
| Origin | Lateral epicondyle of humerus. |
| Insertion | Olecranon and upper portion of ulna. |
| Action | Straightens arm at elbow. |
Anconeus is nestled between the ulna and extensor carpi ulnaris close to the elbow. Here it forms a wedge-shaped relief when tensed.