Fig 6. Oxyhemoglobin concentrations (ΔO₂Hb_AVG) as a function of trials.

Average values across all participants (N = 10) for left ($●$) and right ($●$) prefrontal cortex (PFC) subregions (top to bottom panels) as a function of the trial number: A) Left and right dorsolateral PFC (DLPFC_L/R); B) Left and right ventrolateral PFC (VLPFC_L/R); C) Left and right frontopolar PFC (FPFC_L/R); D) Left and right orbitofrontal cortex (OFC_L/R). Error bars correspond to the standard error of the corresponding means. Piecewise linear regressions (---) use trial 3 as the break point (see bottom graph and text for justification). *** p < 0.0001.