title: Suppressing emotions impairs subsequent stroop performance and reduces prefrontal brain activation.
abstract: Abundant behavioral evidence suggests that the ability to self-control is limited, and that any exertion of self-control will increase the likelihood of subsequent self-control failures. Here we investigated the neural correlates underlying the aftereffects of self-control on future control processes using functional magnetic resonance imaging (fMRI). An initial act of self-control (suppressing emotions) impaired subsequent performance in a second task requiring control (Stroop task). On the neural level, increased activity during emotion suppression was followed by a relative decrease in activity during the Stroop task in a cluster in the right lateral prefrontal cortex (PFC) including the dorsolateral prefrontal cortex (DLPFC), an area engaged in the effortful implementation of control. There was no reliable evidence for reduced activity in the medial frontal cortex (MFC) including the anterior cingulate cortex (ACC), which is involved in conflict detection processes and has previously also been implicated in self-control. Follow-up analyses showed that the detected cluster in the right lateral PFC and an area in the MFC were involved in both the emotion suppression task and the Stroop task, but only the cluster in the right lateral PFC showed reduced activation after emotion suppression during the Stroop task. Reduced activity in lateral prefrontal areas relevant for the implementation of control may be a critical consequence of prior self-control exertion if the respective areas are involved in both self-control tasks.
authors.affiliation: Department of Psychology, Saarland University, Saarbruecken, Germany. malte.friese@uni-saarland.de
authors.forename: Malte
authors.initials: M
authors.lastname: Friese
authors.forename: Julia
authors.initials: J
authors.lastname: Binder
authors.forename: Roger
authors.initials: R
authors.lastname: Luechinger
authors.forename: Peter
authors.initials: P
authors.lastname: Boesiger
authors.forename: Björn
authors.initials: B
authors.lastname: Rasch
mesh_terms: D000328:Adult; D001921:Brain / Q000503:physiopathology*; D004644:Emotions / Q000502:physiology*; D005260:Female; D006801:Humans; D007266:Inhibition, Psychological; D008279:Magnetic Resonance Imaging; D008297:Male; D017397:Prefrontal Cortex / Q000502:physiology; D057190:Stroop Test; D055815:Young Adult
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