TRIFACIAL NERVE. 201 



6is of the muscles of mastication upon one side, the nutri- 

 tive processes in these delicate parts are seriously modified, 

 so as to constitute inflammation. The observation just de- 

 tailed is an argument in favor of this view ; for here the in- 

 flammatory action seemed to be arrested when the action of 

 the paralyzed muscles was supplied by careful feeding. "With 

 this view, the disorders of nutrition observed after division of 

 the fifth may properly be referred to the sympathetic system. 



Pathological facts in confirmation of experiments upon 

 the fifth pair in the lower animals are not wanting ; but it 

 must be remembered that, in cases of paralysis of the nerve 

 in the human subject, it is not always possible to locate ex- 

 actly the seat of the lesion and to appreciate fully its extent, 

 as can be done when the nerve is divided by an operation. 

 In studying these cases, it sometimes occurs that the phe- 

 nomena, particularly those of modified nutrition, are more 

 or less contradictory. 



In nearly all the works on physiology, we find references 

 to cases of paralysis of the fifth in the human subject. One 

 of the most interesting is the case already referred to, re- 

 ported by Mayo, which was published before the experi- 

 ments of Magendie. 1 Numerous cases of this kind have 

 been collected by Longet.* In the appendix to the work of 

 Sir Charles Bell on the Nervous System, several cases are 

 reported, 3 observed by himself and collated from various 

 sources. We have already referred to the cases cited by 

 Schiff and by Lussana, some of which showed alteration of 

 taste, while in others this symptom was absent. 4 In a re- 

 cent article by Dr. H. D. Noyes, Professor of Ophthalmol- 

 ogy in the Bellevue Hospital Medical College, two interest- 



1 See page 196. 



2 LONGET, Anatomic et physiologic du systeme nerveux, Paris, 1842, tome ii., 

 p. 191, et seq. 



3 BELL, The Nervous System of the Human Body, London, 1844, Appendix. 



4 See page 195. 



It is unnecessary to cite all the cases reported of paralysis of the fifth, but 

 they are quite numerous. In addition to those already referred to, the following 



