ANTERIOR ASPECT OF HEAD AND NECK. 



upper border of the thyroid cartilage, and divides into the in- 

 ternal and external carotid. [801] 



External Carotid. Ascending under the posterior belly of 

 the Digastric and the Stylo-hyoid, it finally becomes super- 

 ficial to the internal carotid and divides, behind the neck of 

 the mandible, into the temporal and internal maxillary. It 

 has eight branches, as follows: [803] 



The superior thyroid arises anteriorly, just below the tip of 

 the great cornu of the hyoid, and crosses the Inferior con- 

 strictor to the thyroid body. Its branches are: infra-hyoid, 

 running below the great cornu; laryngeal, accompanying the 

 internal laryngeal nerve ; sterno-mastoid, to the under surface 

 of the muscle; crico- thyroid, crossing the front of that mem- 

 brane; anterior and posterior terminal, to the lateral lobe of 

 the thyroid body. [804] 



The lingual arises anteriorly, opposite the tip of the great cornu 

 of the hyoid and runs forward under the Hyo-glossus and, as the 

 ranine artery, under the tongue to its tip. Its branches are: 

 supra-hyoid, running above the great cornu; dorsalis linguae, to 

 the dorsum of the tongue ; and sublingual, to that gland. [805] 



The facial arises anteriorly, just above the lingual, and runs 

 under the posterior belly of the Digastric and the Stylo-hyoid ; 

 then crossing the mandible at the anterior border of the Mas- 

 seter it crosses the face superficially to the side of the nose and 

 divides into the angular and lateral nasal. Its branches in the 

 neck are: ascending palatine, ascending on the Superior con- 

 strictor and running over its upper edge to the soft palate; 

 submental, running forward along the lower border of the man- 

 dible; submaxillary, to that gland; and tonsillar, running 

 through the Superior constrictor to the tonsil. Its branches in 

 the face are: inferior labial, running below the mouth; inferior 

 and superior coronary, to the margins of the lips ; masseteric, 

 crossing the Masseter; buccal, crossing the Buccinator; lateral 

 nasal, to the side of the nose; and angular, to the inner angle 

 of the orbit. [806] 



[79] 



