144 



HEAD AND NECK 



The Deep Fascia. The deep fascia forms the superficial 

 boundary or roof of the posterior triangle. It is attached 

 below to the upper border of the middle third of the clavicle ; 



Great occipital 

 nerve 

 Posterior 

 auricular vein 



Small occipital nen 

 Great auricular nerve 

 Splenius capitis 

 Accessory nerve 



Middle supra- 

 clavicular nerve . 

 Posterior supra- 

 clavicular 



Scalenus medius 



Nervus cutan- 



eus colli 



upper branch 

 Nervus cutaneus 

 colli 



Anterior supra- 

 clavicular nerve. 



FIG. 66. The superficial branches of the cervical plexus. 



above, to the superior nuchal line of the occipital bone; 

 anteriorly it is continuous with the fascia of the sterno-mastoid 

 and posteriorly with the fascia of the trapezius. It is pierced 

 by (i) the supra-clavicular branches of the cervical plexus, (2) 

 the external jugular vein, (3) small cutaneous branches of the 



