1 — Pronator quadratus; 2 — Flexor digitorum profundus; 3 — Flexor digitorum superficialis; 4 — Flexor retinaculum; 5 — Common flexor sheath; 6 — Tendinous sheaths of digits of hand; 7 — Tendinous sheath of flexor pollicis longus; 8 — Flexor pollicis brevis; 9 — Tendinous sheath
of flexor carpi radialis
