Figure 6

Correlation time-course predicts choice probability. (a) The spike count correlation matrix for the ambiguous cylinder: The matrix entries rSC(t_i, t_j) are the rSC values computed from time-bins t_i in the SU and t_j in the MU (100 ms independent time-windows) and averaged over all sites. The color bar indicates the magnitude of the rSC values. The more saturated colours indicate off-diagonal, i.e. the four lagging and leading time-bin pairs with respect to t_i (excluding the main diagonal; see black arrows), that were used to compute rSC_τ=4. Inset shows histogram of the rSC values averaged along the main diagonal. Black bars show the diagonals that were used to compute rSC_τ=4 (b) rSC_τ=4 averaged over all sites are plotted as a function of time-bins t_i. Error bars show s.e.m. The black line indicates a 2^nd order polynomial fit to the rSC_τ=4. (c) The matrix for Pearson correlation coefficients was computed between the derivative of the fitted polynomial in b) and CP across recording sites. Matrix entries simply represent the correlation coefficients obtained for each possible time-point pairing. White contours mark clusters with a significant Pearson correlation (p = 0.01; cluster based permutation test). The color bar indicates the magnitude of the correlation. Dashed black lines mark 1 s (i.e. half of the trial). (d) The CP time-courses averaged across sites with a negative derivative (black; n = 21) and positive derivative (purple; n = 18). The red horizontal lines mark significant differences between the two CP time-courses (p < 0.05; cluster based permutation test). Shaded area indicates s.e.m.