Frontoparietal activity with minimal decision and control
Frontoparietal activity with minimal decision and control
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DOI：
10.1523/jneurosci.3165-06.2006
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发表时间：
2006-09-20
影响因子：
5.3
通讯作者：
Duncan, John
中科院分区：
文献类型：
--
作者：
Hon, Nicholas;Epstein, Russell A.;Duncan, John
在人类大脑中，一个众所周知的额顶叶回路，包括外侧前额叶皮层（LPFC），前补充运动区/前扣带皮层（pre-SMA/ACC），以及上级和下顶叶皮层，参与认知控制。有一种观点认为，额顶叶皮层对关注的或与任务相关的信息进行了灵活的描述，在大脑的许多不同部位对这些信息进行了偏向处理。在这里，我们分开额顶编码的关注信息，其积极使用的行为。在两个实验中，受试者在一个固定的位置观看一系列视觉刺激。在第一个实验中，没有任务要执行;在第二个实验中，决策与新刺激事件的发生正交。即使在这些简单的情况下，我们发现，参加刺激的变化给广泛激活LPFC，前SMA/ACC和顶叶皮层，而无人值守的变化没有。即使没有行为控制，这些经典的“控制”区域是活跃的，在简单的更新参加信息。
In the human brain, a well known frontoparietal circuit, including lateral prefrontal cortex (LPFC), presupplementary motor area/anterior cingulate cortex (pre-SMA/ACC), and both the superior and inferior parietal cortex, is involved in cognitive control. One proposal is that the frontoparietal cortex holds a flexible description of attended or task-relevant information, biasing processing in favor of this information in many different parts of the brain. Here, we separate frontoparietal coding of attended information from its active use in behavior. In two experiments, subjects watch a stream of visual stimuli in a fixed location. In the first experiment, there is no task to perform; in the second, decisions are orthogonal to the occurrence of new stimulus events. Even in these simple circumstances, we find that attended stimulus changes give extensive activation of LPFC, pre-SMA/ACC and parietal cortex, whereas unattended changes do not. Even without behavior to control, these classical "control" regions are active in simple update of attended information.