BRACHIAL ARTERY. 325 



BRACHIAL ARTERY. 



The Brachial artery passes down the inner side of the arm, from 

 the lower border of the latissimus dorsi to the bend of the elbow, 

 where it divides into the radial and ulnar arteries. 



Relations. In its course downwards, it rests upon the coraco- 

 brachialis muscle, internal head of the triceps, brachialis anticus, and 

 the tendon of the biceps. To its inner side is the ulnar nerve ; to the 

 outer side, the coraco-brachialis and biceps muscles ; in front it has 

 the basilic vein, and is crossed by the median nerve. Its relations, 

 within its sheath, are the venae comites. 



Plan of the relations of the Brachial Artery. 



In Front. 



Basilic vein, 

 Deep fascia, 

 Median nerve. 



Inner Side. 

 Ulnar nerve. 



Brachial Artery. 



Outer Side. 



Coraco-brachialis, 

 Biceps. 



Behind. 



Short head of triceps, 

 Coraco-brachialis, 

 Brachialis anticus, 

 Tendon of Biceps. 



The branches of the brachial artery are, the 



Superior prof un da, 

 Inferior profunda, 

 Anastomotica magna, 

 Muscular. 



The Superior profunda arises opposite the lower border of the latis- 

 simus dorsi, and winds around the humerus, between the triceps and 

 the bone, to the space between the brachialis anticus and supinator 

 longus, where it inosculates with the radial recurrent branch. It ac- 

 companies the musculo-spiral nerve. In its course it gives off the pos- 

 terior articular artery, which descends to the elbow-joint, and a more 

 superficial branch which inosculates with the interosseous articular 

 artery. 



The Inferior profunda arises from about the middle of the brachial 

 artery, and descends to the space between the inner condyle and ole- 

 cranon in company with the ulnar nerve, where it inosculates with the 

 posterior ulnar recurrent. 



The Anastomotica magna is given off nearly at right angles from the 



