360 PHYSICAL EXPRESSION. 



know or recognize the orange, that it remembers 

 the orange, and so it is. 



The growing power of co-ordination of move- 

 ments is expressed by the enumeration of certain 

 movements counting a higher figure during that 

 period of time in which the infant has often been 

 shown the orange. 



Enumeration will show the increasing co-ordina- 

 tion; tracings will show the interval of time be- 

 tween the stimulation and the co-ordination of 

 movements resulting. 



If instead of making observations on a healthy 

 child, with a healthy brain, the experiment be 

 made on one whose brain was defective at birth, 

 we may get very different results. A special 

 feature of the spontaneous movements of an idiot 

 consists in the repetition of a very few combinations, 

 occurring over and over again, in monotonous and 

 useless succession. Such movements are seen in 

 the condition termed athetosis (see chap. vi.). 



By saying that these combinations of movements 

 are useless, I mean they are not excited by external 

 stimuli directly, and are not in unison with, and 

 do not vary with the external stimuli, and so they 

 are useless to the individual. Such a child, owing 

 to its defective brain, would give results on our 

 enumerators showing that certain combinations 

 only, occur with a high degree of frequency. Other- 

 wise expressed, we may say that the high degree 

 of frequency of a very few combinations of move- 

 ments, together with the fact that these combina- 



