ANTERIOR ASPECT OF HEAD AND NECK. 



jaw and runs (first .part) forward in the zygomatic fossa, be- 

 tween the jaw bone and spheno-mandibular ligament, to the 

 lower border of the External pterygoid; then (second part) 

 upward and forward, over or under the lower head of the Ex- 

 ternal pterygoid; and then (third part) between the heads of 

 the External pterygoid and through the pterygo-maxillary fis- 

 sure into the spheno-maxillary fossa. [810] 



Branches of first part of internal maxillary: deep auricular, 

 to the external auditory meatus; tympanic, through the Gla- 

 serian fissure to the tympanum. Middle meningeal, running 

 between the roots of the auriculo-temporal nerve, through the 

 foramen spinosum, and upward in a groove on the great wing 

 of the sphenoid; it gives off petrosal, Gasserian, tympanic, and 

 orbital branches, and divides into anterior and posterior ter- 

 minal branches. Small meningeal, running through the fora- 

 men ovale. Inferior dental, accompanying the inferior dental 

 nerve in the inferior dental canal and giving off the following 

 branches: lingual, accompanying the lingual nerve; mylo- 

 hyoid, accompanying the mylo-hyoid nerve; molar, to the mo- 

 lars; bicuspid, to the bicuspids; incisive (terminal), to the 

 canine and incisors; and mental (terminal), running through 

 the mental foramen to the chin. [811] 



Branches of second part: masseteric, running through the 

 sigmoid notch to the Masseter; anterior and posterior deep 

 temporal, ascending under the Temporal; pterygoid, to those 

 muscles; and buccal, accompanying the long buccal nerve to 

 the cheek. Branches of third part: posterior superior dental, 

 descending to the back of the upper jaw; infra-orbital, ac- 

 companying that nerve to the face; posterior or descending 

 palatine, running through the posterior palatine canal and 

 forward on the roof of the mouth; Vidian, through the Vidian 

 canal to the pharynx ; pterygo-palatine, through the pterygo- 

 palatine canal to the pharynx; spheno-palatine, running 

 through the spheno-palatine foramen to the nose and 

 giving off a naso-palatine branch which descends with 

 6 [81] 



