TRA NS VERSE CER VIC A L 



515 



joint and shonklcr-joint; (7) llit^ subscapular, given off as the artery is passing 

 over the suprascapuhir ligament, de,seends to the subscapular fossa between the 

 subscapularis and the bone, and anastomoses with the infrascapular In'anch of the 

 dorsal sca])ular artery, and Avith the subscapular and posterior scapular arteries; 

 (8) the suprasjoinous branches, which ramify in the supraspinous fossa, and 

 supply the supra-spinatus muscle and the i)eriosteum and the nutrient artery to the 

 bone; (D) the infnisi)in()us branches, which ramify in a similar way in the infra- 

 spinous fossa, giving off' like twigs to the infra-spinatus nuiscle, the periosteum, and 

 tiic l)one. 



THE TUANSVERSE CERVICAL ARTERY 



Tiie transverse cervical or transversalis colli artery — somewhat larger than 

 the suprascapular artery — runs like the latter vessel tr;nisversely outwards across 

 the root of the neck, but on a slightl}^ higher j)lane, and a little above the clavicle. 



Fig. 343. — Scheme of Axa.sto.moses of the Right Scapular Arteries. (Walsham.) 



Subscapular branch of sitprascajmlar artery 

 Supraspinous branch of suprascapular artery 



I'iist'-rior scafiular artery 



Supraspinous branch 

 of posterior scapular 

 artery 



Sub^capu/ar branch 

 of posterior scapular 

 artery 



Branch of intercostal 

 artery 



Branch of intercostal 

 artery 

 Continuation of posterior 

 scapular artery 



fi'prascapular artery 



Acromial brunch 

 of acromio- 

 thmacic 



Acromial refe 



ubscapular branch 



of stiprascapuliir 



artery 

 Infraspinous branch 



of suprasci'jiular 



artery 

 Subscapular brunch 



of axillary artery 



I'orsal sctijiiilar lirnnch of 

 subscapular artery 



Infrascapular branch of 

 <l07-sal scapular artery 



Continuation ofsnb- 

 stapular artery 



At its origin from the thyroid axis it lies under the sterno-mastoid; on leaving the 

 cover of this muscle, it crosses the upper part of the subclavian triangle, lying here 

 only beneath the platysma and cervical fascia; further outwards, it passes beneath 

 the anterior margin of the trapezius and omo-hyoid muscle, and at the outer 

 margin of the levator anguli scapuke divides into the ]>o.sterior sca])ular and super- 

 ficial cervical arteries. In this course it crosses the j)hrenic nerve, the scalenus 

 anticus, the brachial ])lexus, and the scalenus medius. At times it passes between 

 the cords of the brachial plexus. 



The terminal branches of the transverse cervical artery are: — (1) The 

 posterior sca})ular; and ( 2 ) the suiK-ilicial cervical. The ])()steri( a- scapular occa- 

 sionally arises from the thinl jiortion of the subclavian artery. 



