Neuroanatomical and functional substrates of the greed personality trait

Greedy individuals often exhibit more impulsive decision-making and short-sighted behaviors. It has been assumed that altered reward circuitry prospection network is associated with greed personality trait (GPT). In this study, we first explored the morphological characteristics (i.e., gray matter volume; GMV) of GPT combined univariate multivariate pattern analysis (MVPA) approaches. Second, adopted a revised version inter-temporal choice task independently manipulated amount delay time future rewards. Using brain-imaging design, reward- prospection-related brain activations were assessed their associations further examined. The MVPA results showed was GMVs in right lateral frontal pole cortex, left ventromedial prefrontal occipital pole. Additionally, observed amount-relevant (responding to circuitry) orbitofrontal cortex negatively individual’s variability scores, whereas time-relevant system) dorsolateral dorsomedial superior parietal lobule, anterior cingulate positively scores. These findings not only provide novel insights into neuroanatomical substrates underlying human dispositional greed, but also suggest critical roles processing on greed.