Fig. 6.

A, Relative durations of bursts in PSE motor neurons recorded in experimental preparations at different cycle frequencies. The mean relative durations of bursts of impulses recorded from PSE axons in A2, A3, A4, and A5 were calculated for four ranges of cycle frequencies. The plotted points are means of all experiments within that range. In this figure, these points are offset about the mean frequency to make the error bars readable. B,Relative durations of depolarizations of 2A cells as functions of frequency. Frequency modulation was accomplished with the method described in Figure 5.