126 Mr..;Shaw on the Facial Nerves. 



his tongue ; but when the bread was put into the left side, he 

 could easily dislodge it by the action of his cheek. The saliva 

 constantly flows from the right side of his mouth, and when 

 drinking, part of the fluid escapes from the same side. The 

 paralysis of the orbicularis oris was farther shewn by the 

 inability to hold my pencil, or a tobacco-pipe, in the right side 

 of his mouth. 



I next examined the comparative degree of sensibility in the 

 two cheeks ; when he was pricked on the right cheek with a 

 needle, he seemed perfectly callous, even though I drew blood, 

 but on giving the least prick to the left side, he immediately 

 started ; the same difference in the degree of sensibility was 

 observable in pulling a hair from each whisker, (the sensibility 

 of the right and left limb corresponded with that of the cheeks.) 



Having now satisfied myself, that the power of the 5th pair 

 was not only deficient, as far as it controls the actions of the 

 muscles of the mouth and cheeks, but also in giving sensibility 

 to the skin, I proceeded to examine the state of the 



^ose. — On putting hartshorn to the right nostril, he inhaled 

 it as well as with the left, and immediately all the symptoms 

 observable in a person about to sneeze were presented. As the 

 nose was turned up, and the aire nasi of both sides were equally 

 in action, this was a sufficient proof of the state of the para- 

 lyzed side being very different from that of the last case re- 

 lated. The power of the 5th over the nose was tried ; by 

 tickling the inside of the right nostril, no effect was produced ; 

 but on tickling the left nostril, the symptoms of sneezing were 

 again evident. It is almost needless to beg the reader to com- 

 pare the phenomena, in this case with those observable in the 

 little girl. 



The eye and eyelids. — The ball of the eye followed the pencil 

 as it was carried before him. I forgot to examine the state of 

 the pupil, but in other cases of hemiplegia, I have found the 

 pupil of the paralytic side to be more dilated than the other ; 

 however, I wish to avoid the discussion of this question at 

 present, as we have not yet been able to unravel the intricacy 

 of the several nerves, which supply the eye-ball and its 



