ARTERIES OF THE SHOULDER. 



FIG. 233. 



described under the head of blood-vessels of the neck. (See 

 Figs. 120, 153.) 



ARTERIES OP THE SHOULDER. 



Axillary artery, (axilla, the arm-pit.) The axillary 

 artery is the continued trunk of the subclavian, and 

 receives this name at the 

 lower border of the first 

 rib, behind the subclavian 

 muscle and clavicle ; from 

 this point it descends ob- 

 liquely outward through 

 the axillary space, where 

 it is surrounded by a quan- 

 tity of loose cellular and 

 adipose tissue, containing 

 many lymphatic glands, 

 and terminates at the 

 lower edge of the tendi- 

 nous insertions of the la- 

 tissimus dorsi and teres 

 major muscles in the bra- 

 chial artery. 



In its course it is seen to pass behind the pectoralis major 

 and minor, resting upon the first intercostal and serratus 

 magnus, and having the coraco-brachialis on its outer or 

 humeral side. The axillary vein ascends in front and to 

 the inside. Above the little pectoral muscle, the brachial 

 plexus of nerves is to the outside of this artery, behind the 

 muscle, and surrounds it in such manner that it is embraced 

 by the outer and inner roots of the median nerve, and a 

 little lower down it has the median nerve in front, the 

 radial behind, the ulnar and internal cutaneous on the 



FIG. 233 represents the axillary artery and nerves, a Deltoid. 6 Clavicle, 

 c Subclavius. d Pectoralis minor, e Second rib. /Axillary vein, g Axillary 

 artery, h Space between brachial artery and brachial plexus of nerves. 

 (Superior thoracic artery. jThoracia media. fcThoracica acromialis, its 

 descending branch. Jits acromial branch. mThoracica inferior artery and 

 nerve, n Thorcica alaris. o Internal cutaneous and ulnar nerves, p Median 

 nerve, q External cutaneous nerves, r Coraco brachialis. s Biceps. 



