That moment when you realize we're all done for... "Brain imaging results revealed that the choice to seek counterfactual information is associated with stronger activity in the caudate, brain regions implicated in processing of intrinsic and extrinsic rewards. In addition, the caudate and the nucleus accumbens showed greater activity when participants realized that they could have won more points. These results suggest that the striatum plays a crucial role in seeking and processing counterfactual information." https://academic.oup.com/scan/article/21/1/nsag012/8529764