1 — Triceps brachii; 2 — Humerus; 3 — Lateral supraepicondylar ridge; Lateral supracondylar ridge; 4 — Extensor carpi radialis longus; 5 — Profunda brachii artery; Deep artery of arm; 6 — Radial nerve; 7 — Brachioradialis; 8 — Brachialis; 9 — Cephalic vein; 10 — Biceps brachii; 11 — Brachial fascia; 12 — Brachial artery; 13- Medial cutaneous nerve of forearm; Medial antebrachial cutaneous nerve; 14 — Brachial veins; 15 — Medial cutaneous nerve of arm; Medial brachial cutaneous nerve; 16 — Median nerve; 17 — Basilic vein; 18 — Superior ulnar collateral artery; 19 — Medial intermuscular septum of arm; 20 — Ulnar nerve
