1 — Interosseous membrane; 2 — Extensor pollicis brevis; 3 — Abductor pollicis longus; Tendon; 4 — Dorsal carpal arch; 5 — Radial artery; 6 — Perforating branch; 7 — Princeps pollicis artery; 8 — Extensor pollicis longus; Tendon; 9 — Dorsal interossei; 10 — Adductor pollicis;
11 — Dorsal metacarpal arteries; 12 — Radial artery, dorsal carpal branch; 13 — Ulnar artery, dorsal carpal branch; 14 — Extensor retinaculum;
15 — Radial nerve, deep branch; Posterior interosseous nerve; 16 — Posterior interosseous artery; 17 — Extensor carpi ulnaris
