112 EQUINE ANATOMY. 



Course. Has a large ganglion developed on the sensory root, 

 the Gasserian, resting on the cartilage of the occipito-spheno- 

 temporal hiatus, and divides into the (i) ophthalmic, (2) superior 

 maxillary and (3) inferior maxillary divisions. 



Exit. The first branch passes through the smallest of the large 

 supra-sphenoidal foramina to the orbit. The second passes 

 through the foramen rotundum to the orbit. The third passes 

 through the foramen ovale to the temporo-maxillary articulations. 



1. Ophthalmic Nerve. To skin of forehead, eyelid, lachrymal 

 gland and nasal fossa. 



2. Superior Maxillary. Passes along infra-orbital canal, where 

 it ends in small branches to the face and upper lip. It sends 

 branches to the eyeball, palate, nose and teeth of the upper jaw. 



3. Inferior Maxillary. The motor root unites with this, passes 

 down, enters inferior dental canal, supplies the muscles of masti- 

 cation, teeth of lower jaw. 



Branches are 



Muscular superficial, temporal, gustatory, to tongue, mylo-hyoid 

 and mental. 



Sympathetic Ganglia of Fifth. 



OPHTHALMIC OR CILIARY. 



Situation. Near nerve to inferior oblique muscle of orbit. 



Motor Root. From third. 



Sensory Root. Nasal branch of ophthalmic. 



-Sympathetic Root. Cavernous plexus. 



Distribution. Ciliary nerves to iris. 



SPHENO-PALATINE OR MECKEL'S. 



Situation. In space between orbit and foramen rotundum. 



Motor Root. Vidian nerve of seventh. 



Sensory Root. Superior maxillary. 



Sympathetic Root. Cavernous plexus by Vidian. 



Distribution. To orbit and palate. 



OTIC OR ARNOLD'S. 



Situation. Near origin of inferior maxillary nerve and Eusta- 

 chian tube. 



Motor Root. Small petrosal from seventh. 



