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BOLD responses in the thalamus (A) and middle frontal gyrus (B) in morning compared with evening types during subjective morning and evening sessions according to working memory load (N0, N2, N3). Contrasts are displayed at p < 0.001, uncorrected threshold, overlaid on the mean normalized structural MR image of the population (n = 28). Corresponding parameter estimates are plotted in the right (arbitrary units).
