426 



THE SUBCLAVIAN ARTERIES. 



to the cervical glands and the integument. When the posterior scapular arises 

 separately from the subclavian, the name superficial cervical may be given to the 

 remaining part of the transverse cervical artery. 



The posterior scapular artery (iv), whether arising from the transverse cervical 

 artery or directly from the subclavian, passes backwards to the upper angle of the 



Fig. 353. THE ARTERIES OP THE 



SHOULDER AND DORSUM OF 

 THE SCAPULA, WITH THEIR 



ANASTOMOSES. (Tiedemann.) 

 I 



a, sterno-mastoid muscle ; b, 

 trapezius, turned inwards ; c, 

 splenius capitis, and below it 

 splenius colli ; d, levator anguli 

 scapulae ; e, serratus posticus su- 

 perior ; f, g, rhomboideus minor 

 and major, divided near the 

 scapula ; h, teres major ; i, teres 

 minor ; k, long head of triceps ; 

 /, serratus magnus ; m, latissimus 

 dorsi ; n, deltoid muscle, turned 

 down ; o, portion of infraspinatus 

 muscle attached to the great tube- 

 rosity of the humerus, the rest 

 having been removed from the 

 infraspinous fossa ; 1, occipital 

 artery, appearing between the 

 trapezius and sterno-mastoid mus- 

 cles : 2, superficial cervical artery ; 

 2', 2', posterior scapular artery ; 

 2 +, its supraspinous branch ; 

 3, suprascapular artery ; 3', the 

 same after passing into the in- 

 fraspinous fossa, where it anasto- 

 moses with 4, the dorsal scapular 

 artery ; 4', descending branch of 

 dorsal scapular ; 4", thoracic 

 branches of subscapular artery ; 

 5, posterior circumflex artery, 

 emerging from the quadrangular 

 space, and sending branches up- 

 wards to the shoulder-joint, for- 

 wards round the humerus, and 

 downwards into the deltoid mus- 

 cle ; 6, anastomosis of acromial 

 branches of suprascapular and 

 acromio-thoracic arteries. 



scapula, under cover of the 

 levator anguli scapulae, and 

 then, changing its direc- 

 tion, runs downwards be- 

 neath the rhomboid mus- 

 cles, as far as the inferior 

 angle of that bone. It 



anastomoses freely on both surfaces of the scapula with the divisions of the 

 suprascapular and subscapular arteries/and supplies branches to the rhomboidei, 

 serratus magnus, and latissimus dorsi muscles, communicating at the same time with 

 the posterior branches of some of the intercostal arteries. Near the upper angle of 

 the scapula this artery gives off a considerable supraspinous branch, which ramifies 

 on the surface of the supraspinatus and supplies that muscle together with the 

 overlying portion of the trapszius and skin. 



