448 



THE NERVOUS SYSTEM. 



certain number of the large ordinary cerebro-spinal nerve- 

 fibres, after traversing the ganglia, pass into the sympathetic. 



FIG. 152. 



General plan of the branches of the fifth pair (after a sketch by Charles Bell). y z . 

 1, lesser root of the fifth pair ; 2, greater root passing forwards 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, which is connected below with the spheno-palatine 

 ganglion, and passes forwards to the infra-orbital foramen ; 5, placed on the bone 

 over the foramen ovale, marks the submaxillary nerve, giving off the anterior au- 

 ricular and muscular branches, and continued by the inferior dental to the lower 

 jaw, and by the gustatory 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 stylo-mastoid foramen. 



Of the fibres derived from the ganglia of the sympathetic 

 itself, some go straightway towards the viscera, the rest pass 

 through the branches of communication between the sympa- 

 thetic and the branches of the spinal nerves, and joining these 

 spinal nerves, proceed with them to their respective seats of 

 distribution, especially to the more sensitive parts. 



