1 — Extensor carpi radialis brevis; 2 — Radial artery, dorsal carpal branch; 3 — Extensor retinaculum; 4 — Ulnar artery, dorsal carpal branch; 5 — Interosseous membrane of forearm; 6 — Extensor indicis; 7 — Extensor carpi ulnaris; 8 — Posterior interosseous artery; 9 — Recurrent interosseous artery; 10 — Extensor carpi ulnaris; 11 — Anconeus; 12 — Olecranon; 13 — Triceps brachii, lateral head; 14 — Radial collateral artery; 15 — Brachioradialis; 16 — Cubital anastomosis; 17 — Supinator muscle; 18 — Extensor digitorum; 19 — Extensor carpi radialis brevis and longus; 20 — Extensor pollicis longus; 21 — Abductor pollicis longus; 22 — Extensor pollicis brevis; 23 — Extensor carpi radialis longus;
24 — Radial artery; 25 — Extensor pollicis longus