Fig. 3.

(a) Activity in the vmPFC ROI increased linearly to CS + _{vic reinf} during extinction learning whereas responses in this region decreased to the CS + _{vic safety.} (b) Functional connectivity during extinction using the vmPFC ROI as seed revealed coupling with a region located in the lateral amygdala and anterior hippocampus that was stronger during the CS + _{vic rein} vs the CS + _{vic safety}. T-values are superimposed on a normalized average structural image. fMRI display threshold: P < 0.005, uncorrected for illustrative purposes. Error bars represent SEM.