Fig. 4: Evidence dip in individual FEF neurons for Monkey 1.

a A schematic of the regression model showing alignment of the kernels to the presample, sample, and saccade. b Smoothed firing rate for two example neurons across conditions. Colors are the same as in Figs. 2–3. c Evidence kernel for the example neurons in (b). Error bars indicate 95% confidence interval of the regression coefficient. d For each point in time, the number of neurons in the population with significantly positive (top) or negative (bottom) evidence kernel is shown (p < 0.05, one-tailed t test). e Mean evidence kernel across neurons. Error bars indicate 95% confidence interval of the mean. f The first singular vector of the evidence kernels is shown, along with (g) the corresponding factor scores of each neuron. Analyses are based on 57 neurons.