Fig. 4.

Right LPFC activation (peak at 39, 41, 40) detected in the session-by-group interaction during the task cue period (P < 0.05, small-volume-corrected; image is shown at P < 0.001, uncorrected for display). Neural responses are displayed in transaxial and coronal formats. The bar plot represents mean contrast values and SEs for each session/group. During the first session, the LPFC in the reward group showed significantly larger activation than that in the control group (two-sample t₂₆ = 2.62, P < 0.05). However, the activation became significantly smaller in the reward group than in the control group during the second session (two-sample t₂₆ = 2.27, P < 0.05).