62 A MANUAL OF ANATOMY. 



below itself, thus forming a plexus over the entire side of 

 the face. 



All these branches in the parotid gland lie anterior or 

 superficial to the external carotid artery and the temporo- 

 maxillary vein. 



The Temporal Artery. Figs. 2, 3. 



Branches of the trunk of the temporal artery. The ante- 

 rior auricular passes to the top and front of the ear ; the 

 orbital is a small branch which runs forward to the orbit 

 between the two layers of the temporal fascia (see page 30) ; 

 the middle temporal perforates the temporal fascia and 

 muscle, just above the zygomatic arch, to reach the under 

 surface of the temporal muscle and ramify in the fossa 

 there ; and the transverse facial, which is seen to run 

 forward from the parotid gland, just below the zygomatic 

 arch, between the arch and Stenson's duct, to anastomose 

 with the infra-orbital branch of the internal maxillary in 

 front, and the muscular branches of the facial below ; be- 

 sides these there are small twigs given to the parotid gland 

 and temporomaxillary articulation. 



The Facial Vein. Figs. 3, 15. 



This starts at the inner angle of the eye as the continua- 

 tion of the angular vein. It takes a direct course down- 

 ward and outward under the greater and lesser zygomatic 

 muscles and platysma to the facial notch in the lower jaw, 

 where it lies posterior to the artery. In its course it re- 

 ceives branches corresponding to the branches of the facial 

 artery, and communicates with the infra-orbital vein. For 

 continuation in neck, see page 74. 



Depressor Ang-uli Oris. 



Origin. From the external oblique line of the inferior 

 maxillary bone. 



