THE SCALENE MUSCLES. 



589 



The SCALENI MUSCLES are usually described as three in number, Number of 

 and are named from their relative position, anterior, middle, and 'muscles. 

 posterior ; they extend from the transverse processes of the cervical 

 vertebrae to the first and second ribs. 



The SCALENUS ANTICUS (fig. 213, J ) is somewhat conical in shape, Scaienus 



FIG. 213. A VIEW OF THE COMMON CAROTID AND SUBCLAYIAN ARTERIES 

 (QCAIN'S "ARTERIES"). 



1. Anterior scalenus, with the 

 phrenic nerve on it. 



2. Middle scalenus. 



3. Levator anguli scapulae. 



4. Oino-hyoid. 



5. Rectus capitis anticus major. 



6. Common carotid artery. 



7. Subclavian vein. 



8. Subclavian artery. 



9. Digastric muscle. 



10. Parotid gland. 



11. Submaxillary gland. 



1 2. Thyroid body. 



13. Trapezius muscle, reflected. 



and arises from the anterior tubercles of the transverse processes origin ; 

 of the third, fourth, fifth, and sixth cervical vertebrae. It is 

 in* rt '<! into the upper surface and inner border of the first rib, insertion 

 surrounding the rough mark or projection on this part of the bone 

 known as the scalene tubercle( fig. 214, p. 590). 



