The timing of cognitive control in partially incongruent categorization
The timing of cognitive control in partially incongruent categorization
复制标题
部分不一致分类中认知控制的时机
DOI：
10.1002/hbm.20449
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发表时间：
2008-09-01
影响因子：
4.8
通讯作者：
Li, Hong
中科院分区：
文献类型：
--
作者：
Chen, Antao;Xu, Peng;Li, Hong
我们设计了一个新颖的任务，部分不一致分类（PIC），以检查认知控制的时间。在PIC任务中，参与者根据特定的概念对探测刺激进行分类，并且与概念对应的特征的数量是不同的。当有一个特征时（c1条件），探测只会引起分类，但当有一个以上的特征时（c2和c3条件），探测也会引起认知控制。在这里，事件相关电位（ERP）的高时间分辨率被用来调查在冲突检测和控制过程中的活动的时间模式。在刺激锁定波形中，认知控制引起的N2对c2和c3的响应比c1大得多，并且c2和c3之间没有明显差异。N2之后是P3，其在c2和c3上比c1试验少得多，c2和c3之间没有差异。对两个不同波c2−c1和c3−c1的偶极子源分析进一步表明，在认知控制条件下，N2和P3的相应偶极子分别位于前扣带皮层（ACC）和前额叶皮层（PFC）。综上所述，本研究结果支持ERP组件在PIC任务的反应反映了认知控制的时间过程：N2响应冲突信息，随后激活P3控制这一冲突。前扣带回和前额叶皮层之间的联系得到了它们在试验中顺序激活的支持。《大脑地图》，2008年。© 2007 Wiley利斯公司
We designed a novel task, partially incongruent categorization (PIC), to examine the timing of cognitive control. In the PIC task, participants categorized the probe stimulus according to a specific concept, and the number of features corresponding to the concept was varied. When there was one feature (c1 condition), the probe would elicit only categorization, but when there was more than one feature (c2 and c3 conditions), the probe would also elicit cognitive control. Here, the high temporal resolution of event‐related potentials (ERPs) was utilized to investigate the temporal patterns of activity during conflict detection and control. Cognitive control elicited a N2 that was much larger in response to c2 and c3 than c1 in stimulus‐locked waveforms, and no difference was evident between c2 and c3. The N2 was followed by a P3 that was much less on c2 and c3 than c1 trials, with no difference between c2 and c3. A dipole source analysis for two difference waves, c2−c1 and c3−c1, further showed that the corresponding dipoles of the N2 and P3 in the cognitive control conditions were in the anterior cingulate cortex (ACC) and prefrontal cortex (PFC), respectively. Taken together, the present findings support that ERP components in response to the PIC task reflect the time course of cognitive control: the N2 responds to conflict information and subsequently activates the P3 to control this conflict. The connection between the ACC and PFC is supported by their sequential activation within trials. Hum Brain Mapp, 2008. © 2007 Wiley‐Liss, Inc.