DEEP SHOULDER MUSCLES 



357 



minor (fig. 353) arise from the spines of the last cervical and first four 

 or five thoracic vertebrae, pass obliquely downward across the deep dorsal 

 muscles beneath the trapezius and are inserted into the vertebral margin 

 of the scapula. The third to the seventh cervical nerves supply this set of 



Fig. 353. ^The Levator Scapula and Rhomboidei. 



Semispinalis capitis 

 Splenius capitis 



Levator scapulae 

 Serratus posterior superior 



Rhomboideus minor 



Splenius cervicis 

 Rhomboideus major 



Supraspinatus 



Serratus posterior inferior 



Obliquus internus 



muscles. The levator scapulae is supplied by the third and fourth cervical 

 nerves, the rhomboids by the fifth (dorsal scapular), the serratus anterior by 

 the fifth to the seventh (long thoracic nerve) . The muscles of this group ele- 

 vate the scapula, rotate it, and draw it backward (rhomboidei) or forward 

 (serratus anterior). When all contract together they raise the thorax. 



