100 SCIENCE AND PHILOSOPHY OF THE ORGANISM 



acting, and the " historical basis of reacting " can only 

 be said to have been created by physico-chemical processes, 

 that is, by the stimuli affecting the brain, as regards its 

 elements; these elements stand at the disposal of an agent 

 that is autonomic. 



6. REGULABILITY OF MOVEMENT WITH REGARD TO THE 



MOTOR ORGANS 



We have finished our discussion of the regulations occur- 

 ring in the brain and of all that is connected with them, and 

 therewith have closed at the same time the study of the 

 second type of the possible regulations concerned in move- 

 ment, those relating to the intermediate organs, at least 

 as far as the " hemispheres " come into account. Before 

 adding a few words about regulation among the so-called 

 " lower 5; brain-centres certain remarks seem to be required 

 about the third possible kind of regulation of movement, 

 that is, about regulations regarding the motor organs as 

 such. This may be done rather shortly, for facts may 

 suitably be reduced here to the two other types of 

 regulation. 



The dog who is wounded in one of his legs, and 

 therefore is forced to walk on three legs only, is a good 

 instance of what we mean : regulations are going on 

 here in the use of the three legs left ; these three legs 

 are used otherwise than they would have been used if 

 there were still all four of them. It seems to me that 

 all instances of this kind may without difficulty be sub- 

 sumed under our first class of regulations in motion, those 

 dealing with the correspondence between stimuli and 



