330 ULNAR ARTERY. BRANCHES. 



brevis muscle and palmar fascia. It is accompanied in its course by 

 the venae comites, and is in relation with the ulnar nerve for the 

 lower two-thirds of its extent. 



Plan of the relations of the Ulnar Artery. 

 In Front. 

 Deep fascia, 



Superficial layer of muscles, 

 Median nerve. 



In the Hand. 



Tendinous arch from the pisiform bone, 



Palmaris brevis muscle, 



Palmar fascia. 



Flexor profundus digitorum, 

 Pronator quadratus. 



In the Hand. 



Annular ligament, 

 Tendons of the flexor sublimis digitorum. 



The Branches of the ulnar artery may be arranged like those of the 

 radial into three groups : 



/ Anterior ulnar recurrent, 



1 Posterior ulnar recurrent, 



Fore-arm, < T-*.-...-,,..- f Anterior interosseous, 



/ 1] * Posterior interosseous. 



\ Muscular. 



Wrist i Carpalis anterior, 

 \ Carpalis posterior. 

 Hand, Digitales. 



The Anterior ulnar recurrent arises immediately below the elbow, 

 and ascends in front of the joint between the pronator radii teres and 

 brachialis anticus, where it inosculates with the anastomotica magna 

 and inferior profunda. The two recurrent arteries frequently arise by 

 a common trunk. 



The Posterior ulnar recurrent, larger than the preceding, arises im- 

 mediately below the elbow joint, and passes backwards beneath the 

 origins of the superficial layer of muscles ; it then ascends between 

 the two heads of the flexor carpi ulnaris, and beneath the ulnar nerve, 

 and inosculates with the inferior profunda and anastomotica magna. 



