Carotis externa. 



193 



536. Diagram of the Ramification of the Internal 

 Maxillary Artery. 



f) The posterior auricular artery, Art. auricularis posterior, 

 ascends at the anterior border of the mastoid process, and gives off the 

 stylo-mastoid branch, Art. stylo-mastoidea, through the stylo -mastoid 

 foramen to the Canalis Fattopiae. The anterior branch of the posterior 

 auricular artery supplies the auricle, the posterior the soft parts behind 

 the ear. 



The terminal branches of the external carotid are: 



1 . The super ficialtemporal artery, Arteria temporalis super- 

 ficialis, which is divided upon the temporal fascia into an anterior 

 and a posterior branch. The former supplies the integument of the 

 temporal and frontal regions, the latter passes to the vertex. The super- 

 ficial temporal artery gives off the following branches: the trans- 

 verse facial, Art. transversa fatiei, which passes transversely up to 

 the region of the infraorbital foramen; the middle temporal, Art. 

 temporalis media, which, perforating the temporal fascia, supplies the tem- 

 poral muscle; the anterior auricular, Art. auriculares anteriores 

 (2 3 inferior and 1 superior), to the external auditory meatus and to 

 the anterior surface of the pinna ; the orbital, or Art. zygomatico-orbi- 

 talis, which passes obliquely forwards to the margin of the orbit. 



2. The internal maxillary artery, Art. maxillaris internet, 

 which supplies all the cavities of the head with branches, can be divided 

 into three portions, in the first part of its course it lies behind the con- 

 dyle of the lower jaw, in the second part it runs obliquely forwards 

 and upwards upon the outer surface of the external pterygoid muscle, 

 in the third part it enters the spheno-maxillary fossa. 



