Fig. 10.

Summary histograms of perturbed cycle periods and their phase correlation with segmental motoneurons. Similar afferent modulation of cycle periods were evident in recordings from Hb9 INs (gray circles) and ventral roots (black squares). L5 stimulation resulted in significantly longer perturbations of the locomotor cycle. Note the different scales of y-axes for L2/L3 and L5 stimulation. Cycle periods are normalized to average values of prestimulus cycle periods. Sample sizes: L2/L3 afferent stimulation during the extensor phase, n = 6 neurons and the flexor phase, n = 5. L5 stimuli during the extensor/flexor phases, n = 7 cells.