HEAD. Ill 



into three branches, the ophthahnic and superior naaxil- 

 lary nerves, the inferior maxillary nerve. 



Motor root. — Runs forward from the pons Yarolii 

 under the inferior face of the ganglion of Gasser, and 

 soon mingles with the inferior maxillary branch of the 

 sensitive root. 



a. Ophthalmic. — Course : Enters the susphenoidal 

 canal with the third and fourth pairs, and in it divides 

 into the frontal, lachrymal and nasal or palpebro-nasal 

 nerves ; the frontal going to the orbital foramen, the 

 lachrymal ramifying in tlie lachrymal ghmd, the nasal 

 reenters the cranium with the ophthalmic artery, runs 

 through the plate of the ethmoid into the nasal fossa, 

 where it divides. 



h. Superior maxillary. — Origin : Internal and su- 

 perior portion of the Gasserian ganglion. Course : 

 Placed in a groove on the internal face of the sphe- 

 noid, soon reaches the largest sphenoidal canal, runs 

 to the orbital hiatus, passes through the supra-maxillo- 

 dental canal, where it dips and runs as far as the lateral 

 surface of the face, where it terminates by suborbital 

 branches. Collateral branches : The orbital to some 

 muscles of the eye ; the great or anterior palatine to 

 the palatine groove and to the palate ; the staphyline 

 or posterior palatine to the velum palati ; the nasal or 

 spheno-palatine to the pituitary membrane; the dental 



