/'//A 1 II !:. in AND NECK. (>i 



remove the pleura. The artery ijives off its deep cervical branch, which inos- 

 culates with the artcritt princcps ccrricis, a branch of the occipital. 'I he ana-t<> 

 mosis takes |>lace between the cmnplexiis and semispinalis colli muscles. By 



Right anterior cerebral 



Internal carotid 

 Right jiosterior cerebral 



Occipital 



Princfps cervicis 



External carotid 



Superficial branch of pr incept cercicis 

 Deep branch 



Transverse 

 Posterior scapular 

 Acromial branch 

 branch 



Anterior circumfie.r 



ilfrtispiintti.'i 



branch 



Posterior circumflex 



Long thoracic 



Subscapular 



Dorsal scapular 



Jnfrascapular 



Subscapulai 



- .Stiff rior intercosfnl 

 Left common carotid 



Lt'it subctavian 



Short thoracic 

 Internal mammary 



Anterior inlet costal 



First aortic inter- 

 costal 



Second aortic inter- 

 costal 



Anterior intercostal 



Third aortic inter- 

 costal 



FIG. 38. THE COU.ATKRAL CIRCULATION AFTER LIGATURE OF THE COMMON CAROTID AND 



SUBCLAVIAN ARTERIES. 

 (A ligature is placed on the common carotid and on the third portion of the sul>clavian artery.) 



this anastomosis the collateral circulation is carried on after ligature of the 

 common carotid artery. (Fig 8 - 38, 39, and 40.) 



The vertebral artery (Fig. 40) is given off from the second stage of the 



