ULNAR ARTERY. 



65 



rdns. Two veins ac- 

 company the artery, and 

 are united across it at 

 intervals. 



,-es. The median 



nerve ( l ) lies to the inner 



side of the vessel for about 



an inch, but then crosses 



over it to gain the outer 



side, the coronoid head of 



the pronator teres being 



placed between the two. 



Rather above the middle 



of the forearm the ulnar 



nerve ( 4 ) reaches the 



artery, and continues 



thence on the inner side ; 



and a small branch ( 5 ), 



sending twigs around the 



artery, courses on it to 



the palm of the hand. 



On the annular liga- 

 ment the artery has passed 

 through the fascia, and 

 lies close to the pisiform 

 bone. The ulnar nerve, 

 with its palmar branch, 

 still accompanies the ves- 

 sel on the inner side. 



Branches. The greater 

 number of the offsets of 

 the artery are distributed 

 to the muscles. Its named 

 branches are the follow- 

 ing : 



a. The anterior ulnar 

 recurrent branch fre- 



FlG. 26.-DISSECTION OF THE DEEP MUSCLES OF THE FOREARM AND OP 



THE VESSELS AND NERVES BETSYEEN THE Two GROUPS OF MUSCLES 

 (ILLUSTRATIONS OF DISSECTIONS). 



d. Its posterior recurrent branch. 



e. Anterior interosseous. 



venae 

 comites ; 



nerves in 

 relation : 



position on 

 the annular 

 ligament. 



anterior and 



Muscles : 



A. Pronator teres. 



B. Flexor longus pollicis. 



c. Flexor profundus digitorum. 



D. Pronator quadratus. 



E. Flexor carpi ulnaris. 



Arteries : 



a. Radial trunk. 



b. Superficial volar branch. 

 G. Ulnar trunk. 



D.A. 



/. Median artery. 

 fj. Brachial trunk. 

 Nen-cs : 



1. Median. 



2. Anterior interosseous. 



3. Cutaneous palmar branch. 

 Ulnar trunk. 



5. Cutaneous 

 ulnar. 



branch of 



