690 TEE VEINS. 



branch, anastomosing with the pterygoid branches of the internal maxillary artery. 

 This vein issues from the parieto-temporal conduit, behind the supra-condyloid 

 eminence ; it receives one or two branches which escape from this conduit by 

 the foramina in the temporal fossa, crosses the temporalis muscle, and is charged 

 with venules which arise in the interior of that muscle, as well as in the textures 

 of the external ear (Fig. 385, 8). 



2. The subzijgomatk vein, a satellite of the homonymous artery, and, like it, 

 is divided into two branches — one accompanying the transverse artery of the 

 face, the other the masseteric artery. The latter branch communicates by its 

 inferior extremity with the external maxillo-muscular vein ; it joins, by its other 

 extremity, an enormous branch which comes from the temporal muscle, and 

 which passes into the sigmoid notch, after anastomosing largely with the deep 

 temporal branches of the internal maxillary vein (Fig. 385, 6). 



2. Internal Maxillary Vein. 



Remarkable for its enormous volume, this vein creeps between the internal 

 masseter muscle and the maxilla, in an oblique direction upwards and backwards. 

 Arriving within the articulation of the jaw, a little below the maxillary condyle 

 and the external pterygoid muscle, it joins the temporal vein after being slightly 

 inflected downwards. It therefore runs its course at a certain distance from the 

 corresponding artery. 



The internal maxillary has for its radicle the buccal vein, which it succeeds 

 near the superior extremity of the buccinator muscle. 



Satellite of the artery and nerve of the same name, this buccal vein, 

 remarkable for its volume, is situated beneath the masseter muscle, near the 

 inferior border of the buccinator muscle ; by its anterior extremity it com- 

 municates directly with the internal maxillary vein, nearly opposite to the 

 junction of the inferior coronary vein ; its posterior extremity is continued 

 directly with the internal maxillary vein. The collateral branches it receives in its 

 course, come from the masseter muscle and the parietes of the cheek. 



On its way it receives a great number of affluents ; these are : 



1. A large lingiud vein, accompanying the small hypoglossal nerve. 



2. The inferior dental vein. 



3. The trunk of the deep temporal veins — a large vessel situated in front and 

 to the inside of the temporo-maxillary articulation, where it communicates with 

 the masseteric vein. This vessel arises in the texture of the temporalis muscle, but 

 particularly in the parieto-temporal confluent, with which it joins through the 

 foramina in the temporal fossa. 



4. The pterygoid veins, numerous branches, only a portion of which come 

 from the pterygoid muscles. The others, arising from the subsphenoidal con- 

 fluent of the sinuses of the dura mater, form, on the superficial face of the 

 external pterygoid muscle, a wide-meshed network which communicates pos- 

 teriorly with the temporal vein, and anteriorly with the confluent of the deep 

 temporal veins. But as these two vessels are bound together, outside the 

 temporo-maxillary articulation, by means of the masseteric artery, it results that 

 this articulation is enlaced on every side by one of the richest venous plexuses in 

 the whole body (Fig 386, 10). 



3, Sinuses of the Dura Mater. 

 We will here describe not only the sinuses of the cranial dura mater 



