Figure 3

Examples of single neurons classified as Task cells. (A) Example of Task cell showing a preference for reach-to-press movements. Activity is shown separately for the Reach-to-Grasp Task (in blue; “R-to-Grasp”) and for the Reach-to-Press task (in red, “R-to-Press”), either when executed in a dark (left panels) or in a light background (right panels). Both SDFs (upper panels) and raster plots of impulse activity (lower panels) are shown for each experimental condition. Neural data from single trials were realigned twice, first to the onset of the fixation LED (FP, left vertical line) and then to the GO signal (GO, right vertical line). The yellow area on the graphs represents the time epoch of major interest for the purpose of the present study, i.e. the DELAY epoch, within which a significant modulation of activity by the factor Task was assessed for the depicted cell. Scale: vertical bar on SDFs, 153 spikes/s. (B) Example of Task cell showing a preference for reach-to-grasp movements. All conventions as in panel A. Scale: vertical bar on SDFs, 68 spikes/s.