238 Mr. Shaw on the Facial Nerves. 



opposite side. This dog is still in very good health, and now affords 

 as strilcing an example of the effect of cutting the respiratory 

 nerve of one side, and a branch of the Vth. of the other, as he 

 did on the day, after the operation was performed. The effects 

 produced by cutting the Vth. will be detailed presently. 



I cut the same nerve of a cat, as near its exit from the stylo- 

 mastoid foramen as I could. When she was irritated, she 

 afforded an excellent example of paralysis of the action of the 

 muscles regulated by this respiratory nerve. She spate with 

 that side only, on which the nerve was entire. Here I succeeded 

 in paralyzing the muscles of the ear ; for, while she spate, the 

 ear of the side on which the nerve was entire, was pulled back, 

 while the other stood erect and motionless. 



The same experiment is easily made on the ass, or it may at 

 any time be done on an ox in the slaughter-house, for while the 

 animal is insensible, and dying from loss of blood, we have only 

 to divide the nerve, as it passes from before the ear; the con- 

 vulsed motion of the nostril of the same side will immediately 

 cease. 



The effect upon the nostril is the most obvious symptom, 

 when the nerve is cut in the ass*. If, after having cut the right 



• I performed this experiment on a horse at Charenton, at the request 

 of M. Majendie, and with the assistance of M. Dupuy, Professor of the 

 Veterinary College there. As 1 was anxious to execute the experiment 

 quickly, and avoid the hemorrhage which is generally a consequence of 

 seeking for the nerve in the middle of the parotid gland, I cut through the 

 s kin anterior to the jugum, in the hopes of immediately finding the nerve . 

 A large branch, which I supposed to be the^ Porlio Dura, was exposed, but 

 on cutting it through, no paralysis of the nostril ensued. 



There was naturally a degree of incredulity on the part of those who 

 were spectators, as to the fact of the actions of the nostril being paralyzed 

 by cutting the Pwtio Dura. But on saying to the gentlemen present, 

 among whom was Dr. Spurzheim, that this being the first time I had 

 made the experiment on a horse, I was afraid I had not cut the principal 

 branch of the Porlio Dura, they, with great liberality, afforded me every 

 assistance. On examining the wound more particularly, I discovered ano- 

 ther large nerve, and on cutting this the nostril was immediately para- 

 lyzed. 



As I had some difficulty in uuderslaudiug why the result of this expcri- 



