Recruitment of lateral rostral prefrontal cortex in spontaneous and task-related thoughts:

摘要: Behavioural and neuroimaging studies suggest that spontaneous task-related thought processes share common cognitive mechanisms neural bases. Lateral rostral prefrontal cortex (RPFC) is a brain region has been implicated both in high-level control processes, such as goal/subgoal integration the manipulation of self-generated thoughts. We therefore propose recruitment lateral RPFC may follow U-shaped function demand: relatively high low-demand situations conducive to emergence thought, high-demand depending on supported by this region. used functional magnetic resonance imaging investigate activity while healthy participants performed two tasks, each with three levels demands, block design. The frequency task-unrelated thoughts, measured questionnaire, was highest low demand condition. Low conditions were compared intermediate level. superior parietal recruited comparisons, additional activations specific contrast. These results involved when (a) task demands are low, mind wanders, (b) requires