根据冲突监测假说,认知控制中的冲突监测和抑制控制主要导致许多认知任务中的前扣带回皮层(ACC)和与控制相关的前额叶皮层(PFC)的活动。然而,默认模式网络(DMN)中的脑区在分类归纳任务中的认知控制中的作用尚不清楚.为了测试ACC的作用,PFC,和类别诱导过程中认知控制引发的DMN子区域,我们使用同时fMRI扫描进行了改良的类别诱导任务.结果表明,左额中回(BA9)和双侧背ACC/额内侧回(BA8/32)对是否出现冲突信息(有/无)敏感,但没有达到冲突的程度。此外,双侧腹侧ACC(BA32),尤其是正确的vACC,DMN的一部分,根据工作记忆,随着认知努力的增加,显示出显着的失活。这些发现不仅为分类过程中背侧PFC和背侧ACC在认知控制中的重要作用提供了进一步的证据,而且还支持了背侧/腹侧ACC在类别诱导任务中的功能区分。
According to the conflict monitoring hypothesis, conflict monitoring and inhibitory control in cognitive control mainly cause activity in the anterior cingulate cortex (ACC) and control-related prefrontal cortex (PFC) in many cognitive tasks. However, the role of brain regions in the default mode network (DMN) in cognitive control during category induction tasks is unclear. To test the role of the ACC, PFC, and subregions of the DMN elicited by cognitive control during category induction, a modified category induction task was performed using simultaneous fMRI scanning. The results showed that the left middle frontal gyrus (BA9) and bilateral dorsal ACC/medial frontal gyrus (BA8/32) were sensitive to whether conflict information (with/without) appears, but not to the level of conflict. In addition, the bilateral ventral ACC (BA32), especially the right
vACC, a part of the DMN, showed significant deactivation with an increase in cognitive effort depending on working memory. These findings not only offer further evidence for the important role of the dorsolateral PFC and dorsal ACC in cognitive control during categorization but also support the functional distinction of the dorsal/ventral ACC in the category induction task.