202 NEEVOUS SYSTEM. 



ing cases are reported, which we had an opportunity of ex- 

 amining during the progress of treatment. In both of these 

 cases, there was inflammation of the eye. In one case, the 

 tongue was entirely insensible upon on side, but there was 

 no impairment of the sense of taste. An interesting feature 

 in one of the cases was the fact that an operation upon the 

 eyelid of the affected side was performed without the slight- 

 est evidence of pain on the part of the patient. 1 



These cases of paralysis of the fifth in the human subject 

 in the main confirm the results of experiments upon the in- 

 ferior animals. In all the cases in w r hich the fifth nerve 

 alone was involved in the disease, without the portio dura 

 of the seventh, there was simply loss of sensibility upon one 

 side, the movements of the superficial muscles of the face be- 

 ing unaffected. When the small root was involved, the mus- 

 cles of mastication upon one side were paralyzed ; but in cer- 

 tain cases in which this root escaped, there was no muscular 

 paralysis. The sense of sight, hearing, and smell, except as 

 they were affected by consecutive inflammation, were little, 

 if at all, disturbed in uncomplicated cases. The sense of 

 taste in the anterior portion of the tongue was perfect, except 

 in those cases in which the seventh, the chorda tympani, or 

 the lingual branch of the fifth after it had been joined by the 

 chorda tympani, was involved in the disease. In some cases, 

 there was no alteration in the nutrition of the organs of spe- 

 cial sense ; but in this respect the facts with regard to the 

 seat of the lesion are not so satisfactory as in experiments 

 upon the lower animals, it being difficult, in most of them, 

 to limit the exact boundaries of the lesion. 



are the most important and satisfactory in their details : The case reported by 

 Montault (Journal de physiologic, Paris, 1829, tome ix., p. 113) ; a case by Dr. 

 Beveridge (Medical Times and Gazette, London, 1868, No. 921, p. 199); a case 

 by Althaus (Medico- Chirurgical Transactions, London, 1869, vol. Hi., p. 27) ; and 

 two cases by Rosenthal (Medicinische Jahrbucher, Wien, 1870, Bd. xix., Heft ii. 

 und iii., S. 163). 



1 NOTES, Paralysis of the Fifth Cerebral Nerve, and its Effects. New York 

 Medical Journal, 1871, vol. xiv., p. 163, et seq. 



