BOUNDARIES OF AXILLA. 



229 



On looking into the space from below, the axillary vein (b) lies on the 

 thoracic side of the artery. 



After the vein has been drawn aside, the artery will be seen amongst 

 the large nerves of the upper limb, having the median trunk (*) to the 

 outside, and the ulnar ( 3 ) and the small nerve of Wrisberg ( 5 ) to the inner 

 side ; the internal cutaneous ( 2 ) generally superficial to, and the musculo- 

 spiral ( 4 ) and circumflex nerves beneath it. This part of the artery gives 

 branches to the side of the chest and the shoulder. The vein receives 

 some branches in this spot. 



Fig. 69. 



VIEW OF THE DISSECTED AXILLA (Illustrations of Dissections). 



Nerves : 



1. Median. 



2. Internal cutaneous. 



3. Ulnar. 



4. Musculo-spiral. 



6. Nerve of Wrisberg. 



6 Internal cutaneous of musculo-pp:ral. 



7. Subscapular. 



8. Posterior pieces of the lateral cutaneous of 



the thorax. 



9. Anterior pieces of cutaneous of the thorax. 



Muscles : 



A. Pectoralis major. 



B. Pectoralis minor. 



c. Serratus magnus. 



D. Lastissimus dorsl. 



E. Teres major. 



F. Subscapularis. 



o. Coraco-brachialis 

 H. Biceps. 

 Vessels : 



a. Axillary artery. 

 6. Axillary vein, 

 e. Subscapular vein. 



d. Subscapular artery. 



e. Posterior circumflex artery. 



Position of the branches of vessels and nerves. The several branches of 

 the vessels and nervea have the undermentioned position with respect to 

 the boundaries : 



Close to the anterior fold, and concealed by it, the long thoracic 



