Figure 6: Neuronal activity as a function of performance.

(a) Average delay period activity (and s.e.m.) for the best stimulus location is plotted for groups of neurons recorded from young monkeys in sessions that fall within each bin of performance (blue points, n=29, 41, 43, 40, 58, 79 for the six data points, respectively). Regression line is superimposed over individual points. Red point represents average delay period activity of all neurons recorded in the adult PFC, plotted at the average adult performance. (b) As in a, but for delay period activity minus the baseline (fixation period) activity, for the same groups of neurons. (c) As in a, but for cue period activity. (d) As in a but for cue period activity minus the baseline.