课件：前臂解剖图谱幻灯.ppt

Pronator Quadratus Origin:- Lower quarter of the anterior surface of the shaft of the ulna. Insertion:- Lower quarter of the anterior surface of the shaft of the radius. Nerve supply:- The anterior interosseous branch of the median nerve. Action:- Pronates the forearm. Pronator quadratus Flexor carpi radialis (cut) Flexor pollicis longus Flexor digitorum profundus Flexor carpi ulnaris (cut) Fig 8. Pronator quadratus. Return to title page THANK YOU SUCCESS * * 可编辑 Arteries and Nerves of the anterior compartment. Title page Ulnar artery:- Larger than the radial artery. It passes between the arch formed by the radial and ulnar attachment of the flexor digitorum superficialis and descends through the anterior compartment. It enters the palm of the hand in front of the flexor retinaculum, and promptly divides in superficial and deep palmer branches. Branches- Muscular branches- to the muscles of the anterior compartment. Recurrent branches- to the anastomosis around the wrist joint Branches to the anastomosis around the wrist joint Common interosseous artery- arises in the upper part of the ulnar artery and then divides in the anterior and posterior interosseous arteries. Anterior interosseous artery:- arises from the common interosseous artery and descends in the anterior compartment to eventually join the anastomosis around the wrist joint. It supplies the deep flexor muscles, and gives off nutrient branches to the the radius and ulna. Brachial artery Median nerve Ulnar nerve Radial nerve Ulnar artery Fig 9. Arteries and nerves of the anterior compartment. Next Return to nerves Arteries and Nerves of the anterior compartment. Posterior interosseous artery- arises from the common interosseous artery and and enters the posterior compartment. Radial artery:- It begins in the cubital fossa when the brachial artery divides into the radial and ulna artery. It passes distally, travels under the brachioradialis, resting on the deep flexor muscles. The artery