370 



ARTERIES OF THE HEAD AND N'ECK. 



To facilitate the arrangement of its numerous branches, this artery 

 may be considered in three parts, viz. : 1, tlie part between the jaw 

 and internal lateral ligament ; 2, the part in contact with the external 

 pterygoid muscle ; and, 3, the part in the si)beno-maxillary fossa. 



A. Branches of the first part. — The branches of the first part of the artery 

 all pass through the bony foramina. 



(rz) The ti/iiijumic hranch. of small size and variable in origin, passes deeply 

 behind the articulation of the lower jaw. and enters the fissure of Glaser. sup- 

 plying the lasator tympani muscle, and the tympanic cavity, where it ramifies 



Fis. 251. 







Fig. 251. — Deep Dissection op the Head and Face, to show the Intepnal 

 Maxillary Arteky and its Branches (from Tiedemann). i 



The right half of the calvarium, the zygomatic arch, and the upper half of the ramus 

 of the lower jaw, with the external pterygoid muscle, have been removed ; some of the 

 superficial muscles of the face have been divided, and the internal pterygoid and 

 buccinator muscles are exposed : 1, facial artery, rising over the edge of the lower 

 jaw ; 2, inferior labial branches ; 2', deep mental branch of the inferior dental artery ; 

 3, facial artery continued ; 4, suj)erior coronary of the facial ; 5, lateral nasal ; 6, frontal 

 branch of the ophthalmic artery, giving descending twigs to communicate with the angidar 

 branch of the facial and with the dorsal nasal ; 7, internal carotid artery ; 8, external 

 carotid artery at the place where it passes through the parotid gland, which has been 

 removed ; 9, division of the external carotid artery into superficial, temporal and internal 

 maxillary arteries ; 10, superficial temporal ; 11, masseteric branch of the external cai'otid 

 artery ; 12, the trunk of the internal jnaxillary artery, at the origin of its inferior dental 

 bi-anch ; 13, on the root of the zygoma, points to the middle meningeal branch, and on 

 the dura mater above, to its distribution ; 14, on the lower pai-t of the temporal 

 muscle separated from the coronoid process of the jaw, is between the deep temporal 

 branches of the artery; 15, pterygoid branches; 16, buccal artery; 17, posterior 

 superior dental, and deepest part of the internal maxillary artery where it enters the 

 spheno-maxillary fossa ; IS, branches of the infraorbital artery issuing upon the face. 



