MECKEL'S GANGLION. 



675 



1 dividing the internal carotid artery ; and it is to be pursued on 

 ? surface of the temporal Lone, beneath the ganglion of the fifth 

 nerve, to the hiatus Fallopii. Its junction with the facial nerve 

 will be seen with the dissection of that nerve. 



The branches of the ganglion to the nose will be found entering Seek 

 the outer surface of the detached mucous membrane opposite the the'nose 8 * 

 <pheno- palatine foramen, with corresponding arteries. One of these 

 nerves (naso-palatine), dissected before in the membrane of the 

 septum, is to be isolated, and to be followed forwards to where it 

 enters the floor of the nose. The branches of the internal maxillary 

 artery with the nerves are to be cleaned at the same time. 



FIG. 239. NERVES OF THE OUTER WALL OF THE NOSE AND OF THE PALATE. 



1. Olfactory tract. 



2. Olfactory bulb giving branches 

 to the nose. 



3. Third nerve. 



4. Fourth nerve. 



5. Fifth nerve. 



10. 



tt 



Nasal nerve of the ophthalmic. 



Meckel's ganglion. 



Vidian nerve. 



Large palatine nerve. 



Small palatine nerve. 



Nasal branches. 



The SPHENO-PALATINE Ol 1 MECKEL'S GANGLION (fig. 239, 2 ) lies Ganglion of 



in the spheno-maxillary fossa, close to the spheno-palatine fora- 

 men, and is connected with the branches of the superior maxillary 

 nerve to the palate. The ganglionic mass is somewhat triangular in 

 form, and of a reddish grey colour. It is situate, for the most part, situation 

 behind the branches (spheno-palatine) of the superior maxillary tion with " 

 nerve, so as to surround only some of their fibres ; and it is prolonged nfthnerve ; 

 posteriorly into the Vidian nerve. Meckel's ganglion resembles the composi- 

 other ganglia in connection with the fifth nerve in having sensory, 

 motor, and sympathetic offsets or roots connected with it. 



The BRANCHES of the ganglion are distributed chiefly to the nose branches, 

 and palate, but small offsets are given to the pharynx and the orbit. 

 Other offsets or roots connect it with surrounding nerves. 



x x 



