Fig. 2.

Extracted functional coefficients from anatomically defined bilateral putamen and caudate nucleus. None of the 4 regions showed modulation by hand versus foot motoric responses. As observed previously, these regions showed a positive response to rewards and a negative response to expected value at the time of outcome. These signals show features consistent with a reward prediction error (RPE). Error bars indicate 95% CI. Stars indicate p < 0.05 for 1-sample t-test against zero, uncorrected for multiple comparisons.