Figure 1.

A, Coronal MRI section through the caudate nuclei indicating locales with DRD₂-DAT genotype interaction on BOLD response during working memory (image thresholded at p < 0.005, uncorrected); B, mean ± SE of BOLD response in caudate of the interaction between DRD₂ and DAT genotypes. C, Three-dimensional rendering indicating the interaction between DRD₂-DAT genotypes on cortical working memory; D, mean ± SE confidence intervals of BOLD response of the interaction between DRD₂-DAT genotype in left middle frontal gyrus activity during working memory.