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Cognitive control in the prefrontal cortex: A central or distributed executive?

Cognitive control is the foundation for attaining goals by flexible adaptation of action to changing environmental demands. It has been hypothesized to be critically dependent upon the prefrontal cortex (PFC). In this mini-review, evidence for domain-general versus domain-specific cognitive control is examined, with a particular focus on attention and memory. The reviewed studies examined different levels of cognitive control in relation to performance and patterns of brain activity, and a few included direct comparisons of cognitive-control modulations across cognitive domains. Within domains, increased demands on cognitive control consistently translated into increased PFC activity, but limited overlap in recruited PFC regions was observed between domains. It is concluded that the PFC supports multiple cognitive-control systems that collectively may be conceived of as a distributed executive.

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