RELATIONS OF THE SUBCLAVIAN ARTERIES. 



365 



Relation to Nerves. The pneumogastric nerve is anterior to the first part 

 of the left subclavian artery, and parallel with it, the recurrent branch on 

 tbis side turning round below the arch of the aorta. The phrenic nerve 



Fig. 262. 



Fig. 262. VIEW OP THE EIGHT COMMON CAROTID AND SUBCLAVIAN ARTERIES, WITH 



THE ORIGIN OF THEIR BRANCHES AND THKIR RELATIONS (from 11. Quaill). 



For the description of the upper part of this figure, see p. 342. The following expla- 

 nation relates to the subclavian artery and its branches : 8, the first part, 8', the third 

 part, of the arch of the subclavian artery ; 8", the subclavian vein, shown by the re- 

 moval of a portion of the clavicle ; 9, is placed on the scalenus anticus muscle in the 

 angle between the transverse cervical and suprascapular branches of the thyroid axis ; 

 30, outer part of the suprascapular artery; 10', transverse cervical branches passing 

 into the deep surface of the trapezius ; 10", the posterior scapular artery, represented as 

 rising directly from the tbird part of the subclavian artery, and passing through the 

 axillary pi ex us of nerves and under the levator anguli scapulae ; 11, on the scaleiius anticus 

 muscle, points to the inferior thyroid artery, near the place where the ascending muscular 

 artery of the neck is given off; the phrenic nerve lies on the muscle to the outside ; ?', 

 the suprasternal twig of the suprascapular artery. 



