Finger Movement. 



87 



Table 15 — Complete oscillations of the reciprocal innervation of the middle finger tabulated with 

 reference to homologous periods of the experimental sessions. — Continued. 



This falling off in the performance from second to second in the dif- 

 ferent experimental periods can be better demonstrated in diagrammatic 

 form (see fig. 9). In plotting these curves the data for the average 

 performance in the six periods for each succeeding 2-second interval has 

 been used (see section i of table 15). The series of normal curves (A) 

 resemble each other very much in form and, for the most part, con- 

 sistently maintain their different levels, each representing the number 

 of oscillations performed in 2 seconds. The uppermost curve in A of 

 figure 9 is for the first 2-second interval. The values represented are 

 9.85, 9.78, 10.0, 10.17, 9.82, and 9.45 for periods 1 to 6. The curves 

 for the second and third 2-second intervals cross each other at periods 

 4 and 5 ; otherwise the points in all the curves are consistent in show- 

 ing a rather regular falling off from second to second throughout the 

 record and the experimental day. The curves for the alcohol days {B in 

 fig. 9) also show a decrease in the number of oscillations performed from 



