THE -NECK 



137 



artery and their venae comites on its surface. The semispinalis 

 capitis is split along the whole length of the incision, and the two 

 parts are undermined and retracted. The deep branch of the 

 ramus descendens and the numerous veins which accompany 



Inferior 



3rd and 4th cervical nerves 

 posterior rain 



Semispinalis cer 



Superior oblique 

 Rectus capitis 

 posterior major 

 ist cervical nerve, 

 posterior ramus 

 Communication 

 between ist and 

 2nd cervical nerves 

 Greater occipital 

 nerve 



. Articular process 



_ _ . Semispinalis capitis 



Longissimus 



capitis 



Splenius 



_ f Trapezius 



FIG. 43.- 



-Exposure of the Posterior Ranii (Primary Divisions) of the 

 Upper Cervical Nerves. 



it should now be secured. They are found running downwards 

 on the deep surface of the semispinalis capitis (complexus), and 

 the arteria profunda cervicis, which ascends between the same 

 muscular layers to anastomose with the ramus descendens 

 (p. 120), may also be controlled at this stage. The semispinalis 

 cervicis (colli) is now exposed in the lower part of the wound , 



