Figure 5
Temporal dynamics of task-related activity and consistent task-preference during different time epochs. (A) Sliding TPI (window: 200 ms; shift: 50 ms) along the entire duration of the trial was computed on average across Task cells showing a preference for reach-to-press movements during DELAY (in red) and across Task cells showing a preference for reach-to-grasp movements during the same epoch (in blue). Note that TPI values > 0 indicate a preference for reach-to-press movements, while TPI values < 0 indicate a preference for reach-to-grasp movements (as indicated by lateral colored bands); values approximating 0 indicate no difference in neural activity across the two tasks (see Methods). (B) Scatter-plot comparing single-cell TPI values computed on average neuronal activity during the DELAY epoch and during movement execution (epoch MOV; see Methods and Fig. 1) in the population of Task cells and best-fitted linear function (TPIMOV = −0.011 + 0.885 * TPIDELAY; red line; see Results). Note that data points laying in the upper right quadrant represent neurons with consistent preference for Reach-to-Press during the DELAY and MOV epochs; analogously, data points laying in the lower left quadrant represent neurons with consistent preference for Reach-to-Grasp during the two epochs. (C) Sliding TPI (window: 200 ms; shift: 50 ms) along the entire duration of the trial was computed on average across Task/Background cells showing a preference for reach-to-press movements during DELAY (in red) and across Task/Background cells showing a preference for reach-to-grasp movements during the same epoch (in blue). All conventions as in panel A. (D), Scatter-plot comparing single-cell TPI values computed on average neuronal activity during the DELAY epoch and during movement execution (epoch MOV; see Methods) in the population of Task/Background cells and best-fitted linear function (TPIMOV  = −0.042 + 0.643* TPIDELAY; red line; see Results). All conventions as in panel B.
