138 Journal of Comparative Neurology. 



adjust the motions of the hands, the involuntary centres in the 

 thalami, are all engaged in the process and none of them can 

 be dispensed with. As the most central of them we regard the 

 voluntary progress of directive impulses, which to an unsophis- 

 ticated self-observation appear as the deliberate decision of a 

 free will upon which the motions of the lower centres depend. 

 They represent the focus of consciousness and the few facts 

 that are well ascertained suggest the idea that the corpora striata 

 are the organ of this voluntary directive activity. 



