THE NERVOUS SYSTEM. 



601 



some filaments from, a buccal branch of the inferior division of the fifth 

 nerve, yet it derives its motor power from the facial, for it is paralyzed 

 together with the other muscles that are supplied by the facial, but 

 retains its power when the other muscles of mastication are paralyzed. 

 Whether, however, the branch of the fifth nerve which is supplied to 

 the buccinator muscle is entirely sensory, or in part motor also, must 

 remain for the present doubtful. From the fact that this muscle, be- 

 sides its other functions, acts in concert or harmony with the muscles of 



J^. 1, lesser root of the fifth 

 L;3,pla 



Fig. 367. General plan of the branches of the fifth pair. 



pair ; 2, greater root passing forward into the Gasserian ganglion ; 3, placed on the bone above 

 the ophthalmic nerve, which is seen dividing into the supra-orbital, lachrymal, and nasal 

 branches, the latter connected with the ophthalmic ganglion; 4, placed on the bone close to the 

 foramen rotundum, marks the superior maxillary division, whicn is connected below with the 

 spheno-palatine ganglion, and passes forward to the infra-orbital foramen ; 5, placed on the bone 

 over the foramen ovale, marks the inferior maxillary nerve, giving off the anterior auricular 

 and muscular branches, and continued by the inferior dental to the lower jaw, and by the gus- 

 tatory to the tongue ; a, the submaxillary gland, the submaxillary ganglion placed above it in 

 connection with the gustatory nerve ; 6, the chorda tympani ; 7, the facial nerve issuing from 

 the stylomastoid foramen. (Charles Bell.) 



mastication, in keeping the food between the teeth, it might be sup- 

 posed from analogy, that it would have a motor branch from the same 

 nerve that supplies them. There can be no doubt, however, that the 

 so-called buccal branch of the fifth is, in the main, sensory; although 

 it is not quite certain that it does not give a few motor filaments to the 

 buccinator muscle. 



(b.) Sensory. Through the branches of the greater or ganglionic 

 portion of the fifth nerve, all the anterior and antero-lateral parts of the 



