1894.] Degenerations in the Brain and Spinal Cord, fyc. 273 



The evidence would tend to show that the weakness in the two 

 cases is due to different causes. 



PART III. Results of Absinthe Stimulation. 



The absinthe has been injected either immediately after the opera- 

 tion or after complete recovery. There are, therefore, two categories 

 of experiments, viz., " immediate " and " remote " ; but, as a rule, 

 the difference between the average results in both cases is slight. 

 The fit was registered by spring myographs attached to the extensor 

 tendons of the fore paws. 



1. Removal of one Cerebral Hemisphere, or Hemisection of the Hesen~ 

 cephalon, and Immediate or Remote Absinthe Stimulation. 



Result. There are bilateral fits. On the paretic side the initial fit 

 lay be much smaller than on the left side ; in the subsequent fits, 

 ins is more marked than clonus ; the final clonic contractions are 



numerous. 





 ^ 



Removal of Left Motor Area ; Immediate and Remote Stimulation. 



Result. The fits upon the right and left sides more closely re- 

 ible one another ; there is considerable clonus upon the " paretic " 

 le as well as upon the normal. 



3. Removal of both Hemispheres. 



Result. Immediate removal of the hemispheres arrests the fits ; a 

 slight respiratory response can, however, be elicited. Where one 

 hemisphere has been first removed, and after recovery the remaining 

 hemisphere and absinthe has been given, contractions have been 

 obtained, occurring at regular intervals and equal upon both sides ; 

 in one case the contraction was most marked upon the side corre- 

 sponding to the hemisphere first removed. Removal of both hemi- 



iheres and stimulation upon the second day was followed by two 

 >ng fits, made up of a series of contractions following one another 



irly rapidly, but not so rapidly as in the clonus when a hemisphere 



present. 



Where both motor areas have been removed in succession, regular 



uic and clonic bilateral responses have been obtained ; the rhythm 

 the clonus is much slower than when the cortex is intact. 



