Figure 4. Time-frequency coherence and temporal evolution of the coherence averaged in the 0–10 Hz frequency bandwidth for a representative subject (n = 1, panel A, top) and averaged across all subjects (n = 10, panel B, bottom) at locomotion initiation in the non-normalized data segment.

As in Figure 1, the vertical red and grey lines show the onset and the end of the transition period, respectively. Data are only presented from the 1.5 s preceding the transition onset to the 1.5 s following it (because data are less synchronized the further they are from the transition onset). In the time-frequency coherence graphs, all non-significant coherence values have been set to zero based on a 99% confidence limit (single subject = 0.045; pooled data = 0.005). In both A) and B), the left panel is the head forward condition and the right panel is the head left condition. Note that the scale of coherence level for all subjects is half the scale presented in coherence graphs for the individual subject. TO = toe-off.