THE BRANCHES OF THE FIFTH NERVE. 



731 



communication with the posterior branch is a slight thickening which has received 

 the name of the ganglion of Valentin ; and at its point of communication with the 

 anterior branch is a second enlargement, which is called the ganglion of Bochdalek. 

 Neither of these is probably a true ganglion. 



The anterior superior dental branch, of large size, is given off from the supe- 

 rior maxillary nerve just before its exit from the infra-orbital foramen ; it enters a 

 special canal in the anterior wall of the antrum, and divides into a series of 

 branches which supply the incisor and canine teeth. It communicates with the 

 middle dental nerve, and gives off a nasal branch, which passes through a minute 

 canal into the nasal fossa, and supplies the mucous membrane of the fore part of 

 the inferior meatus and the floor of this cavity, communicating with the nasal 

 branches from Meckel's ganglion. 



Sensory root. 

 Motor root. 



Auricula-temporal 

 nerve. 



FIG. 395. Distribution of the second and third divisions of the fifth nerve and submaxillary ganglion. 



The palpebral branches pass upward beneath the Orbicularis palpebrarum. 

 They supply the integument and conjunctiva of the lower eyelid with sensation, 

 joining at the outer angle of the orbit with the facial nerve and malar branch of 

 the orbital. 



The nasal branches pass inward ; they supply the integument of the side of 

 the nose and join with the nasal branch of the ophthalmic. 



The labial branches, the largest and most numerous, descend beneath the 

 Levator labii superioris, and are distributed to the integument of the upper lip, 

 the mucous membrane of the mouth, and labial glands. 



All these branches are joined, immediately beneath the orbit, by filaments from 

 the facial nerve, forming an intricate plexus, the infra-orbital. 



