Y16 



MUSCLES OF THE FOREARM. 



Function. To flex the hand and make tense the palmar 

 aponeurosis. This muscle is sometimes absent. 



The flexor carpi ulnaris (Fig. 22*7) arises from the 

 inner condyle tendinous, from the inner side of the olecra- 

 non process fleshy and tendinous, from the ridge upon the 

 inner side of the ulna nearly its whole length, and from 

 the fascia of the forearm. It forms a round tendon which 

 is inserted into the pisiform bone, and base of the metacar- 

 pal bone of the little finger. 



Function. To flex the hand, and bring it towards the 

 ulna. A bursa is seen between the tendon and os pisiforme* 

 It is related with the ulnar artery, which see. 



Flexor digitorum sublimis perforatus, (Fig. 227.) Dis- 

 section. Kemove the superficial muscles, and the flexor 

 sublimis is brought to view. 



It arises from the inner condyle and coronoid process, 

 tendinous and fleshy fleshy from the tubercle of the radius 

 and for three or four inches below the tubercle. Before the 

 muscle reaches the wrist it divides into four tendons which 

 pass to the palm of the hand beneath the anterior annular 

 ligament, and then diverge to be inserted into the second 

 phalanx of each finger. The tendons of this muscle are 

 enclosed in a strong sheath, and at their intersection split 

 into two, through which the tendon of the perforans passes. 



Function. To bend the second phalanges on the first. A 

 large bursa surrounds the tendons of this muscle beneath 

 the annular ligament. 



The flexor digitorum profundus perforans (Fig. 228) 

 arises beneath the sublimis, from the upper anterior sur- 

 face of the ulna and inner portion of the interosseous liga- 

 ment, fleshy also fleshy from the coronoid process of the 

 ulna and inner side of the olecranon process. A thick 

 muscle is formed, which at the lower part of the arm 

 divides into four flat tendons, which go beneath the annular 

 ligament, enter the ligamentous sheaths on the fingers, 

 pass through the slits in the perforatus, and are inserted 

 into the last phalanx of each finger. Function. To bend 

 the last phalanges, and with the sublimis the hand. 



