HEAD AND ANTERIOR CERVICAL STRUCTURES. 



29 



Inferior Thyroid Branches: 



Tracheal branches. 



Inferior laryngeal branch. 



Inferior thyroid veins, 666. (652) 



Right vein. 



Left vein. 



Suprascapular or transversalis humeri, 546. (536) 

 Suprascapular veins, 654. (641) 

 Transverse cervical or transversalis colli, 5467. 

 Transverse cervical veins, 654. (642) 

 Internal mammary artery, 548. (538) 



Cervical portion. 



Superior intercostal artery, 550-1-2. (540-1-2) 

 Branches : Deep cervical branch : 



(Muscular. Anastomotic. Vertebral or 

 spinal). 



First intercostal branch. 

 Arteria aberrans. 



The superficial branches of the cervical plexus have already been displayed ; some of the deep branches 

 may now be exposed ; others will be shown later, as the deeper structures are dissected. 



Cervical nerves, 828-9. (809) 

 Upper four nerves : 



First nerve. Second nerve. Third and fourth nerves. 

 Cervical plexus, 829. (809-10) 



Upper four cervical nerves. 



The following table (from Cunningham) indicates the origin, branches, 

 and distribution of the cervical nerves: 



Superficial or 

 Cutaneous. 



I Ascending. 

 , Transverse. 



[ Descending. 



f Smail occipital. 

 ( Great auricular. 



Superficial cervical. 

 ( Supraclavicular. 

 - Suprasternal. 

 (^ Supra-acromial. 



From ad. 



From ad and 3d. 



From 3d and 4th. 



f Muscular. 



Deep. 



I Communicating. 



Deep branches, 831-2. (812-13) 

 Xerve to sterno-mastoid. 



