Prefrontal cortex activation in task switching: an event-related fMRI study
Prefrontal cortex activation in task switching: an event-related fMRI study
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DOI：
10.1016/s0926-6410(99)00029-4
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发表时间：
2000-01-01
期刊：
影响因子：
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通讯作者：
von Cramon, DY
中科院分区：
文献类型：
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作者：
Dove, A;Pollmann, S;von Cramon, DY
当必须在两个任务之间进行切换时，性能比重复执行相同任务的试验要慢。这一发现被归因于任务切换所需的时间消耗控制过程。先前的研究结果表明，认知控制过程的其他范式，前额叶皮层参与执行控制。我们使用事件相关功能磁共振成像研究任务转换中的前额叶皮层参与。任务重复条件激活了双侧外侧前额叶和运动前皮质、双侧前额叶、左侧顶内沟、SMA/前SMA区域和楔叶/楔前叶，并在任务切换条件下显示出额外的激活。这证实了外侧前额叶皮层参与任务转换的假设。然而，研究结果也表明，该区域既不是唯一的区域参与任务转换，也不是一个区域专门参与任务转换。(C)2000 Elsevier Science B. V.保留所有权利。
When a switch between two tasks has to be carried out, performance is slower than in trials where the same task is performed repeatedly. This finding has been attributed to rime-consuming control processes required for task switching. Previous results of other paradigms investigating cognitive control processes suggested that prefrontal cortex is involved in executive control. We used event-related fMRI to investigate prefrontal cortex involvement in task switching. Regions in the lateral prefrontal and premotor cortex bilaterally, the anterior insula bilaterally, the left intraparietal sulcus, the SMA/pre-SMA region and the cuneus/precuneus were activated by the task repetition condition and showed additional activation in the task switch condition. This confirmed the hypothesis that lateral prefrontal cortex is involved in task switching. However, the results also showed that this region is neither the only region involved in task switching nor a region specifically involved in task switching. (C) 2000 Elsevier Science B.V. All rights reserved.