Fig. 4.

Percent signal change in the left inferior frontal gyrus (IFG) and anterior cingulate cortex (ACC) as a function of condition and age. (A) Blood oxygen level dependent response for each of the condition in the left (top) and ACC (bottom). (B) Using an emotional bias index, we showed that older adults were disproportionally affected, as indexed by reduced brain activation, for positive distractors compared to negative distractors. Activation in younger adults was enhanced for positive distractors compared to negative distractors. Error bars indicate standard error of the mean (SEM)