Separating sustained from transient aspects of cognitive control during thought suppression
Separating sustained from transient aspects of cognitive control during thought suppression
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DOI：
10.1111/j.1467-9280.2007.01891.x
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发表时间：
2007-04-01
影响因子：
8.2
通讯作者：
Macrae, C. Neil
中科院分区：
文献类型：
--
作者：
Mitchell, Jason P.;Heatherton, Todd F.;Macrae, C. Neil
关于人们如何调节自己的思想的认知理论表明，在不同的时间过程中，涉及到两种控制过程。这些认知解释与最近的执行控制神经模型相似，这些模型表明前额叶皮层（PFC）介导控制过程分配的持续变化，而前扣带皮层（ACC）传递对额外控制的短暂需求。结合这些认知和神经控制模型，我们使用最近开发的分析技术来区分当受试者试图抑制不想要的想法时大脑激活的短暂变化和持续变化。结果与两种模型一致：在试图抑制思想时，背侧PFC表现出持续的激活增加，而双侧ACC表现出与不想要的想法出现相关的短暂性增加。这些数据支持了关于PFC和ACC对执行控制的不同贡献的建议，并为个体如何调节他们的思想的双过程模型提供了初步的神经影像学支持。
Cognitive theories of how people regulate their thoughts have suggested the involvement of two control processes that occur over different time courses. These cognitive accounts parallel recent neural models of executive control, which suggest that the prefrontal cortex (PFC) mediates sustained changes in the allocation of control processes, whereas the anterior cingulate cortex (ACC) relays a transient need for additional control. Combining these cognitive and neural models of control, we used recently developed analysis techniques to distinguish transient from sustained changes in brain activation while subjects attempted to suppress an unwanted thought. Results were consistent with both models: Dorsolateral PFC demonstrated sustained increases in activation during attempts at thought suppression, whereas bilateral ACC demonstrated transient increases associated with occurrences of unwanted thoughts. These data support proposals regarding the different contributions made by the PFC and ACC to executive control and provide initial neuroimaging support for dual-process models of how individuals regulate their thoughts.