fMRI results.
Because the In a separate whole-brain analysis, we found significant main effects of both choice and intervention. The main effect of intervention identified bilateral clusters in the posterior parietal lobe that in the left hemisphere overlapped with that identified in Figure 4. Analysis of β-coefficients extracted from these clusters showed that, both for less-now and more-later choices, ghrelin produced a deactivation both in the left and the right hemisphere (Because the behavioral effects of ghrelin on delay discounting were driven by women, we also carried out analyses of choice and intervention effects stratified by sex, although these have to be considered exploratory, as they were not preplanned, and the study was not a priori powered to detect sex-dependent effects. The effects identified in the full sample were replicated in female participants. Importantly, an additional main effect of choice was observed in women in the same bilateral posterior parietal cluster for which there was an effect of intervention in the full-sample analysis (