THE SHOULDER 



llol 



side to an angle of about 45°, and when the muscles bounding it in front and 

 behind are contracted. In proportion as the arm is raised, the hollow becomes 

 less, the head of the humerus now projecting into it. When the folds are relaxed 



Fig. 713. — The Brachial Artery. 

 (From a dissection iu the Mu.seuni ol" the Koyal College of Surgeons.) 

 Suprascapular artery and nerve 



Subscapular vessels 



CIRCUMFLEX 

 NERVE 



SUBSCAPl'LAR 

 NERVE 



ULNAR NERVE 

 Triceps 



Jiifevior profunda artery 



INTERNA L CUTA NEO US 

 NER VE 



Brachial artery 

 MEDIAN NERVE 



Ulnar artery 



Biceps 



Axillary artery and 



vein 

 MISCULO-CUTA- 

 NEOVS and in- 

 ternaUu outt-r 

 head of MEDIAN 

 NER VE 

 One of the brachial 

 VPtns 



Coraeo-brachialis 



Cephalic vein 

 Anaslomolica magna artery 



MUSCUL 0-CUTA NEO US 

 NERVE 



Supinator longus 

 Radial rein 



Median vein 



Radial arlfni 



by bringing the arm to the side, the fingers can be puslied into the space so as to 

 examine it. 



The circumflex nerve and posterior circumflex vessels wind round the humerus 

 under the deltoid, a little above the centre of this muscle. 



