THE HEAD AND NECK. 



89 



2. The infraorbital artery enters the infraorbital canal in the floor of the orbit. 

 It appears on the face as the infraorbital. It gives branches to the anterior teeth. 

 These latter pass through the anterior superior dental canals in the anterior wall 

 of the antrum. 



3. Descending palatine passes through the posterior palatine canal, along 

 the roof of the mouth, to the foramen of Stenson, where it anastomoses with the 

 naso-palatine artery. It accompanies the anterior branch of Meckel's ganglion. 



4. The spheno-palatine passes through the spheno-palatine foramen into the 

 cavity of the nose. It divides into the naso-palatine branch to the septum, 



FIG. 53. SCHEME OF THE DISTRIBUTION OF THE FIFTH CRANIAL OR TRK;F.MINAL NERVE. 

 Notice especially: (l) The recurrent branch from the Gasserian ganglion to the dura of the middle fossa 

 and tentorium. (2) Filaments from the carotid plexus. (3) The motor root of the fifth nerve behind 

 the ganglion, but independent thereof. (4) The formation of the otic, submaxillary, Meckel's, and 

 the ciliary ganglion. 



which anastomoses with the descending palatine artery, and some external 

 branches to the lateral walls of the nose. 



5. The Vidian nerve passes through the Vidian canal with the Yidian nerve. 

 It is distributed to the pharynx and Eustachian tube. 



6. The pterygo-palatine passes through the pterygo-palatine canal. It is 

 distributed to the upper part of the pharynx and Eustachian tube. 



Describe tJie inferior maxillary division of t/te fifth cranial nerve. 

 It passes through the foramen ovale with the small meningeal artery. It 

 gives off the following branches : 



i. Muscular branches to all the muscles of mastication. These accompany 

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