Neural mechanisms of dual-task interference and cognitive capacity limitation in the prefrontal cortex.

Watanabe, Kei, 船橋, 新太郎

Simultaneous performance of two tasks often leads to performance deficits in the component tasks. This effect, known as dual-task interference, is thought to be a proof of capacity limitation in cognition, and the lateral prefrontal cortex (LPFC) has been highlighted as its putative neural substrate. Here we recorded single-neuron activities in LPFC while monkeys performed dual tasks that required the simultaneous performance of a varying-load spatial attention task and a spatial memory task. We found that the performance of the monkeys exhibited dual-task interference, and prefrontal neuron activities showed a decreased ability to represent task-relevant information to a degree proportional to the increased demand of the concurrent counterpart task. The locus of the interference was shown to originate in the simultaneous, overloaded recruitment of the same LPFC neural population by the two tasks. These results provide direct neurophysiological evidence for, and constraints to, psychological models of dual-task interference and capacity limitation.

Neural mechanisms of dual-task interference and cognitive capacity limitation in the prefrontal cortex.

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Neural mechanisms of dual-task interference and cognitive capacity limitation in the prefrontal cortex.

この論文をさがす

説明

収録刊行物

詳細情報 詳細情報について

書き出し

問題の指摘

詳細情報詳細情報について