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, 546-7. 

 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: 



Deep. 



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

 Nerve to sterno-mastoid. 



