194 



Carotis externa. 



Acoron. 

 lab. Inf. 



Carotis 

 commun. 



A^lhureo id. sup 



537, Course and Ramification of the Internal Maxil- 

 lary Artery. View from outside. 



The branches arising from the first or maxillary portion 

 of the internal maxillary artery are: 



a) The deep auricular, Art. auricularis profunda, to the external 

 auditory meatus ; 



b) The tympanic, Art. tympanica, through the Glaserian fissure to 

 the tympanum; 



c) The inferior dental, Art. alveolar is inferior, to the posterior 

 opening of the dental canal. While it runs through this canal it gives 

 off the dental twigs, Ramuli dentale.s, to the roots of the teeth, escapes 

 by the mental foramen, where it is called mental a r t e r y, and anastomoses 

 with the inferior labial, inferior coronary and submental branches. Before 

 it enters the dental canal, it gives off the mylo-hyoid artery, for 

 the mylo-hyoid muscle (see Fig. 538 and 539). 



d) The middle meningeal, Art. meningea madia, which passes 

 directly upwards under cover of the external pterygoid muscle and enters 

 the skull by the Foramen spinosum; within the cranium it divides into an 

 anterior and a posterior branch, which supply the dura mater and 

 diploe of the vault of the cranium (see Fig. 540). It sends the Art. 

 petrosa to the tympanic cavity. 



