Neuroimaging can capture brain activity in response to stimuli before a person decides how to respond. Initial affective responses—broadly good or bad feelings about a stimulus—have been associated with activity in evolutionarily conserved subcortical and cortical circuits including the nucleus accumbens (NAcc) and anterior (AIns). Activity then continues through integrative circuits associated with more deliberative and reflective processing. Previous work has suggested that the early affective responses may be more broadly shared across individuals than the final choice behavior.
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