Figure 3.

Recording sites and number of cells modulated by the main factors. A, Frontal T1-weighted MR scan with one electrode in place, in one monkey. B, Locations of recorded TANs (red dots, Monkey 1; blue dots, Monkey 2), reconstructed based on MRI and reported on the Rhesus Macaque “RED” Symmetrical Brain Atlas (Saunders and Phil, 2006). C, Cells modulated by reward size and/or delay in the cue period using spike count (gray bars) or the coefficient of PC1 (black bars) as dependent variable in the two-way ANOVA. D, Distribution of the linear correlation coefficients between spike count (SC) and the coefficient of the PC1 of the significant cells from the two-way ANOVA. Left inset, Scatter plot between SC and PC1 for one cell with low correlation (R²) between SC and PC1. Right inset, Scatter plot between SC and PC1 for one cell with high correlation (R²) between SC and PC1.