1 — Ulnar nerve, dorsal branch; 2 — Extensor retinaculum; 3 — Extensor carpi ulnaris; Tendon; 4 — Extensor pollicis longus; 5 — Radial nerve, deep branch; Posterior interosseous nerve; 6 — Extensor digitorum; 7 — Posterior interosseous artery; 8 — Recurrent interosseous artery; 9 — Anconeus; 10 — Inferior ulnar collateral artery; 11 — Supinator; 12 — Radial nerve, deep branch; 13 — Extensor carpi radialis brevis; 14 — Muscular branches; 15 — Abductor pollicis longus; 16 — Interosseous membrane; 17 — Radial nerve, superficial branch; 18 — Extensor
pollicis brevis; 19 — Extensor pollicis longus; Tendon
