FIG. 4.

Average coherence and phase between LFP and acceleration. A: average coherence between LFP and acceleration during flexion ramp (black) and extension ramp (red) phases. B: average coherence between LFP and acceleration during hold period (green). Averages have been compiled over all available recording sites, in both monkeys. C and D: circular mean coherence phase corresponding to averaged coherences shown in A and B. Black points in D relate to flexion trials (same data as black points in C) for comparison. E–G: phase distribution of coherence between single LFP sites and acceleration for bins in the 6- to 13-Hz range, during (E) extension ramp, (F) flexion ramp, (G) hold period.