31 



only, hut is little known. In otlier words, there is no 

 special cerel)ral vaso-motor centers, except in intimate 

 relation with the ij-eneral motor system, this consistinir 

 Ol the cord, central ganf^jlia, and the convolutions, Ijut 

 this tripartite is in mutual relation and subordination. 

 The careful experiments of Brown-Sequard go to show 

 that this mechanism of voluntary action does not de- 

 pend on clusters of brain cells in one locality, but on 

 the co-ordination of all the cells. The germ of the 

 future therapeutics of brain disease may be indicated 

 in the fact that paralysis is not always produced in the 

 destruction or lesion of nerve matter, but often depends 

 upon the influence exerted by disease upon parts at a 

 distance. The supposed motor centers can be destroyed 

 without any paralysis at all. On the other hand, par- 

 alysis may occur in arm or leg when it was the^ most 

 anterior or posterior part of the brain — the part fur- 

 thest removed from the supposed center of motion — that 

 had degenerated. Paralysis may be quite indejiendent 

 of the destruction of the tissue. It might result from 

 the puncture of the smallest needle. 



It is, therefore, quite evident that if we can divide up 

 our mental modes into sections, and give each a dis- 

 tinct domain within which only each can work : then 

 the laws of co-ordination mean a perfect unanimity of a 

 " committee of the whole " brought about in some for- 

 tuitous way, not from any ah extra influence, but by 

 some intuition among the different organs. Without 

 any autocratic authority to dictate to them they man- 

 age, in health and disease, to do tolerably well. These 

 in the light of the ohjectivlsfs views of mental local- 

 isms should present good examples of modern miracles. 

 The triumvirate of nerve systems have been divided so 

 minutely that in each part is located all the intellect, 

 volitions, emotion, desires and affections of humanity, 



