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Forearm 1 Anterior and posterior compartment Lateral intermuscular septum Anterior compartment Cubital fossa Radius Ulna Posterior compartment Interosseous membrane Ulna Carpal tunnel Radius 2 Anterior compartment Ulnar nerve Median nerve Three layers: • superficial • intermediate • deep Function: • Wrist movements • Flexion of fingers • Pronation Flexor carpi radialis Pronator teres Palmaris longus Flexor carpi ulnaris Palmar aponeurosis Superficial layer: 3 Flexor carpi ulnaris Ulnar nerve Humeral head Ulnar head Function: flexes and adducts wrist joint Flexor carpi ulnaris Innervation: ulnar nerve Pisohamate ligament Pisiform Pisometacarpal ligament 4 Palmaris longus 1. Tendon: 中偏內側 2. Function: flexes wrist joint, anchors skin 3. Innervation: median nerve Pronator teres Flexor carpi radialis Palmaris longus Flexor carpi ulnaris Flexor carpi radialis 1. Tendon:中偏外側 2. Function: flexes and abducts wrist 3. Innervation: median nerve Palmar aponeurosis 5 Pronator teres Humeral head Ulnar head Ulnar artery Median nerve Pronator teres Origin: humeral head, ulnar head Median nerve passes between two heads. Insertion: mid-shaft of radius Function: pronation Innervation: median nerve 6 Intermediate layer: Flexor digitorum superficialis Ulnar artery Radial head Humero-ulnar head Median nerve Flexor digitorum superficialis 7 Ulnar nerve: innervates medial half of flexor digitorum profundus Deep layer Radius Ulna Interosseous membrane Flexor digitorum profundus Flexor pollicis longus Pronator quadratus Flexor retinaculum 8 Brachial artery Anterior ulnar recurrent artery Radial recurrent artery Anterior and posterior interosseous arteries Radial artery Posterior ulnar recurrent artery Ulnar artery Common interosseous artery Palmar carpal branches Superficial palmar branch Deep palmar arch 9 Superficial palmar arch Median nerve Radial nerve Deep branch Ulnar nerve Flexor carpi ulnaris Supinator Superficial branch Pronator teres Anterior interosseous nerve Dorsal branch Palmar branch Palmar branch 10 Posterior compartment Two layers: • superficial • deep Lateral epicondyle Brachioradialis Function: • wrist movements • extension of fingers • supination Anconeus Extensor carpi radialis longus Extensor carpi radialis brevis Extensor carpi ulnaris Extensor digiti minimi Extensor digitorum Superficial layer: 11 Deep layer Supinator (superficial head) Supinator (deep head) ulna Innervation: Posterior interosseous nerve Abductor pollicis longus Extensor pollicis longus Extensor indicis Extensor pollicis brevis Abductor pollicis longus Extensor pollicis brevis Extensor pollicis longus 12 Radial nerve Deep branch Posterior interosseous artery Common interosseous artery Ulnar artery Posterior interosseous nerve Posterior interosseous artery Anterior interosseous artery Dorsal carpal arch 13 Superior ulnar collateral Medial epicondyle Middle collateral branch of deep artery of arm Lateral epicondyle Recurrent interosseous artery 14
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