Figure 6. Bias for Check and dynamic of firing rate.

(a) Both MCC and LPFC show more cases with higher activity in Check compared with Work at decision time. The population histograms show the individual cell Z-values from the sliding glm for all time bins for all cells (see Fig. 4). (b) Average population activity shows for all cases greater dynamical changes for decision to Check (plain lines) than for decisions to Work (dashed). PSTH are displayed for subpopulations of cells that had higher activity in Work than in Check (left), and that had higher activity in Check than in work (right). Data for each decision (Check: lines; Work: dashed lines) and each structure (MCC: black, LPFC: blue). (c) Normalized variance of activity across bins is higher for Check than Work in both structures. Stars indicate significance at P<10⁻³, analysis of variance on log values (Check versus Work decision × Check versus Work preference).