Figure 4

M1 “intent” signal in guinea pigs during treadmill walking. A. Single-unit firing rates during forelimb steps on a moving treadmill. The small black rectangles inside the histogram of each panel indicate individual steps. B–C. Raster plots for each unit showing stand-to-walk (B) and walk-to-stand (C) transitions. The shaded areas indicate time periods immediately following the commencement of steps.