二重課題の神経基盤(<特集>脳機能計測と基礎心理学)

抄録

The neural basis of dual-tasking, including simultaneous, overlapping, and successive dual-tasking, is discussed. There are three main points. The first is concerned with the neural correlates of executive functions, such as resource allocation and task management in dual-tasking. The roles of the prefrontal regions are discussed, as well as the possibility that the executive functions might emerge as interactions of the posterior brain regions. Second, multiple functions of the inferior frontal regions are discussed in terms of temporal order coordination, working memory, and language. The possibility that they might be related to a central bottle-neck in information processing is also discussed. The third point is related to the reduction of activation in the posterior brain regions during dual-tasking, as well as its implication in resource limitation in human cognition and dual-task interference.