Figure 7.

Mean firing rates during the hold windows and transitioning phases. The firing rate of each phase is plotted at a point on the abscissa that corresponds to the mean time at which these phases began and ended. The firing rates are computed by “triggering” at the time of each phase’s onset on a trial-by-trial basis to eliminate the temporal variability of each phase as it relates to trial onset. To facilitate display, the duration of the transition segments is shown over 500 ms, rather than the 200 ms used for analysis. The neurons in panels (A–D) are the same neurons shown in Figures 4A–D.