1 8 Veterinary Medicine. 



predecessors, gives the following as applicable to the equine (ass) 

 brain : 



1 . Stimulation of the origin of the front part of the first frontal 

 convolution, or of the anterior part of the pre-Sylvian convolu- 

 tion, causes approximation of the feet on the opposite side of the 

 body. 



2. Stimulation of the superior part of the first frontal convolu- 

 tion or of the superior part of the post-Rolandic convolution 

 causes closure of the jaws and diduction. 



3. Stimulation of the anterior end of the upper orbital convo- 

 lution, or of the anterior part of the pre-Rolandic convolution, 

 leads to movements of the nose and upper lip. 



4. Stimulation of the antero-superior part of the lower frontal 

 convolution, or the union of the post-Rolandic with the Sylvian 

 convolution causes movement of tongue and jaws. 



5. Stimulation of the union of the vertical and horizontal parts 

 of the orbital convolution or frontal lobe, causes opening of the 

 jaws and bending of head and neck. 



6. Stimulation in the front of the union of the frontal and 

 longitudinal convolutions, or at the union of the Sylvian and sec- 

 ond parietal convolution causes rolling of the opposite eye. 



7. Stimulation of union of the frontal and parietal parts of sec- 

 ond parietal convolution leads to closure of both eyelids or, with 

 a strong current, of lids on both sides. 



8. Stimulation of the second parietal convolution, above and a 

 little behind the extremity of the Sylvian fissure, causes opening 

 of the eye and adduction of the ear on the opposite side, or, if a 

 very strong current, on both sides. 



g. Strong stimulation of the posterior part of the first and sec- 

 ond parietal convolutions causes tonic convulsions. 



10. Currents through the posterior parts of the third and fourth 

 parietal Convolutions give similar convulsions with violent trem- 

 bling of the trunk and members. 



In the Dog's Brain localization is easily made by reference to 

 the crucial fissure which passes outward, right and left, at right 

 angles with the longitudinal fissure about the junction of its 

 anterior with its middle third. Also by four parietal convolutions 

 which run backward from near the crucial fissure, parallel with the 

 longitudinal fissure. They are counted from without inward. 



