PLEXOR SUBLIMIS DIGITORUM. 



211 



Cut the flexor carpi radialis and palmaris longus from their 

 origins, in order to obtain a good view of the whole extent of origin 

 of the flexor sublimis digitorum. 



Fig. 84 * 



Fig. 85.t 



The Flexor sublimis digitorum (perforalus) arises from the inner 

 condyle, coronoid process of the ulna, and oblique line of the radius. 

 The median nerve and ulnar artery pass between its origins. It 



* Superficial layer of muscles of the fore-arm. 1. The lower part of the biceps, 

 with its tendon. 2. A part of the brachialis anticus, seen beneath the biceps. 3. A 

 part of the triceps. 4. The pronator radii teres. 5. The flexor carpi radialis. 6. The 

 palmaris longus. 7. One of the fasciculi of the flexor sublimis digitorum ; the rest of 

 the muscle is seen beneath the tendons of the palmaris longus and flexor carpi radialis. 

 8. The flexor carpi ulnaris. 9. The palmar fascia. 10. The palmaris brevis muscle. 

 11. The abductor pollicis muscle. 12. One portion of the flexor brevis pollicis; the 

 leading line crosses a part of the adductor pollicis. 13. The supinator longus muscle. 

 14. The extensor ossis metacarpi, and extensor primi internodii pollicis, curving around 

 the lower border of the fore-arm. 



t The deep layer of muscles of the fore-arm. 1. The internal lateral ligament of 

 the elbow-joint. 2. The anterior ligament. 3. The orbicular ligament of the head of 

 the radius. 4. The flexor profundus digitorum muscle. 5. The flexor longus pollicis. 

 6. The pronator quadratus. 7. The adductor pollicis muscle. 8. The dorsal interos- 

 seous muscle of the middle finger, and palmar interosseous of the ring-finger. 9. The 

 dorsal interosseous muscle of the ring-finger, and palmar interosseous of the little finger. 



