THE NECK 



123 



crosses the vein and runs downwards and laterally. It is 

 crossed by the occipital artery, and i| inches below the tip of 

 the mastoid process it pierces the sheath of the sterno-mastoid. 



External maxillary artery 

 External carotid artery | Ascending palatine artery 



Facial nerve 

 Posterior auricular 



Internal carotid 

 artery 



Accessory nerve 

 Occipital artery 



Hypoglossal nerve 



Internal jugular vein 



Vagus nerve 



Common facial vein, cut 



fer. descendens hypoglossi 



Rainus communicans 



cervicalis 



Great auricular nerve 

 Common carotid artery 



Sterno-mastoid artery - 

 External jugular vein -- 



Sterno-mastoid, 

 clavicular head 



External maxillary 

 artery 



f Nerve to mylo-hyol 

 Mylo-hyoid fe , an( 

 Submaxillary salivary 

 Stylo-hyoid 



Anterior belly of digastric 

 o-glossus 



Common tendon of digastric 

 ngual artery 

 Hyoid bone 

 Nerve to thyreo-hyoid 

 Internal laryngeal nerve 

 Superior thyreoid artery 

 Thyreo-hyoid muscle 

 Thyreo-hyoid membrane 

 Laryngeal prominence 



External laryngeal nerve 

 Omo-hyoid 

 Sterno-hyoid 



Anterior jugular vein 



FIG. 39. The Side of the Neck. The anterior border of the sterno-mastoid 

 has been retracted in order to expose the underlying vessels and nerves. 



Accompanied by a branch from the occipital artery, it enters 

 the muscle, which it supplies. Its subsequent course is de- 

 scribed on p. 125. 



The Hypoglossal Nerve lies deeply, under cover of the 



