Figure 3.

Differential activity patterns related to relevant and irrelevant reward associations. The NAcc was activated by relevant reward (A), whereas the pre-SMA was activated by irrelevant reward (B). ROI analyses of the extracted signal-change values confirmed that these regions were insensitive to the respective opposite type of reward information as indicated by ns (nonsignificant comparison). Asterisks indicate the reiterations of the voxelwise results (significant at p < 0.01). C, Furthermore, the NAcc activity increase that was selective for relevant reward (depicted as difference between Color$ and Color0) was correlated with response acceleration (depicted as RT difference between Color$ and Color0). D, In contrast, increased pre-SMA activity related to reward-related words (depicted as differences between Color0_Wi$ and Color0_Wi0) was associated with response slowing (depicted as RT difference between Color0_Wi$ and Color0_Wi0).