1 — Proximal phalanx [V], base of phalanx; 2 — Base of metacarpal; 3 — Extensor digiti minimi; 4 — Extensor carpi ulnaris; 5 — Ulna; 6 — Olecranon; 7 — Lateral epicondyle; 8 — Extensor digitorum, Extensor digiti minimi, Extensor carpi ulnaris; Common head; 9 — Extensor digitorum; 10 — Radius; 11- Intertendinous connections