112 



PHYSICAL EXPRESSION. 



children be produced by a condition of brain-cells 

 analogous to that of the growing parts of plants 

 or the cells of the pulvinus, it should be liable at 

 times, under certain circumstances, to great exacer- 

 bations. Thus guided, I have taken tracings of the 

 finger-movements of nervous children and of those 

 suffering from chorea. Samples are presented here, 

 and seem to indicate the following results : 



1. The movements of chorea are far more fre- 



Figs. 12, 13. Tracing of involuntary movements of the finger in a nervous child. 



quent and continuous than might be expected from 

 mere inspection of the hands. 



2. These movements may be but an exaggeration 

 of the movements of a nervous child, usually pre- 

 sent, but often overlooked, tracings of which are 

 given in Figs. 12 and 13. 



3. The twitching movements of chorea may be 

 compound, each visible twitching being compounded 

 of many of the little movements seen in the other 



