CERVICAL PLEXUS 



183 



and communicate with the vagus and hypoglossal. There is a 

 special branch to the diaphragm called the phrenic nerve. 



The Phrenic nerve is formed by branches from the third, 

 fourth, and fifth cervical nerves. It passes down on scalenus 

 anticus, and enters the thorax between the subclavian artery and 



Socia Parotidis 

 Stensen's Duct 



Parotid Gland 



Transverse Facial Artery i 



Mental Artery 



Facial Artery 

 Lingual Artery 



External Carotid Artery.. 

 Superior Laryngeal Artery 

 Superior Thyroid Artery.^ 



Pneumogasti 

 Internal Jug 



Common Carotid Artery.. 1 

 Anterior Belly of Omo-hyoid...\ .JIj]? 

 Ascending Cervical Artery... 



Inferior Thyroid Artery,.. 



..Superficial Temporal Artery 

 ^. Internal Maxillary Artery 



Posterior Auricular 



Artery 



^Occipital Artery 



i. Great Occipital 



Nerve 



Internal Carotid 

 Artery 



-^Deep Cervical 



Glands 



-- Phrenic Nerve 



Scalenus Anticus 



Muscle 



Transverse Cervical 

 Artery 



Subclavian Artery (first part) \ "^ 



\ % Suprascapular Artery 



Thyroid Axis 



FIG. 64. VESSELS AND NERVES IN NECK. 



vein. 



It reaches the diaphragm by passing between the peri- 

 cardium and pleura in front of the root of the lung. The nerve 

 gives off some branches to the upper surface of the diaphragm, 

 then pierces the muscle and supplies the under surface. It also 

 gives off pleural, pericardial, and hepatic branches. 



