Figure 4.

Control of the locomotor cycle period by RSP. A, C, E, Lumbar ventral root activities at different RSP periods of 1, 3, and 5 s, respectively, in each case with an overall individual stimulus frequency of 5 Hz. B, D, F, Expanded segments from the same recordings showing the timing of the locomotor bursts and corresponding RSP trains. G, Scatter plot of the relationship between cycle period of lumbar motor bursts and the period of RSP trains. The gray shaded area represents the confidence interval (C.I.; 95%) for the mean; the dotted line indicates a theoretical linear one-to-one relationship. H, Histogram illustrating the percentage of preparations (n = 5) entrained in a one-to-one manner by the RSP at the indicated train stimulus periods. T stim, period of the stimulation trains.