78 TWENTY-FIRST REPORT. 



position. According to tlie introspection the subjects' were conscious of 

 marlved deviation but could not detect slight movement. 



Now, studying the introspections from the point of view of consciousness 

 of movement regardless of its interpretation by the subject, we find a much 

 greater uniformity of opinion. The great majority of introspections mention 

 sensation of movement and only one subject on one day definitely states that 

 there was no such sensation. 



To sum up our results we find that there is a marked improvement in 

 the control of the tongue with practice and that in practically all cases for all 

 subjects there is a sensation of movement experienced. In the majority of 

 cases the sensation has been interpreted by the subject to properly portray the 

 line drawn. This we believe to be, especially when taken with anatomical 

 findings, a proof that sensation of movement arises from the muscle. 



Lapeer, Michigan. 



