3 Brachioradialis muscle; 4 Flexor carpi radialis muscle; 6 Flexor digitorum superficialis muscle; 9 Tendon of abductor pollicis longus muscle; 10 Tendon of extensor pollicis brevis muscle; 11 Abductor pollicis brevis muscle; 14 Tendon of flexor pollicis longus muscle; 17 Humeral head of pronator teres muscle; 18 Palmaris longus muscle; 19 Flexor carpi ulnaris muscle