BRANCHES OF THE ULNAR. 



415 



The branches of the ulnar artery may be arranged into the following groups : 

 f Anterior ulnar recurrent. 

 Posterior ulnar recurrent. 



forearm. 



Wrist. 

 Sand. 



The anterior ulnar re- 

 current arises immediately 

 below the elbow-joint, passes 

 upwards and inwards be- 

 tween the Brachialis anticus 

 and Pronator radii teres, 

 supplies these muscles, and, 

 in front of the inner con- 

 dyle, anastomoses with the 

 anastomotica magna and in- 

 ferior profunda. 



The posterior ulnar re- 

 current is much larger, and 

 arises somewhat lower than 

 the preceding. It passes 

 backwards and inwards, be- 

 neath the Flexor sublimis, 

 and ascends behind the inner 

 condyle of the humerus. In 

 the interval between this 

 eminence and the olecranon, 

 it lies beneath the Flexor 

 carpi ulnaris, ascending be- 

 tween the heads of that 

 muscle, beneath the ulnar 

 nerve ; it supplies the neigh- 

 boring muscles and joint, 

 and anastomoses with the 

 inferior profunda, anasto- 

 motica magna, and inter- 

 osseous recurrent arteries. 



The interosseous artery is 

 a short trunk, about an 

 inch in length, and of con- 

 siderable size, which arises 

 immediately below the tu- 

 borosity of the radius, and, 

 passing backwards to the 

 upper border of the inter- 

 osseous membrane, divides 

 into two branches, the an- 

 terior and posterior inter- 

 osseous. 



The anterior interosseous 

 passes down the forearm 

 on the anterior surface of 

 the interosseous membrane, 



T , ( Anterior interosseous. 



Interosseous j Posterior m terosseous. 



Muscular. 



Anterior carpal. 



Posterior carpal. 



Deep or communicating branch. 



Digital. 



Fig. 221. Arteries of the Back of the Forearm and Hand. 



Ffttrrfar 



(Vli 



