The Role of Anterior Cingulate Cortex in the Affective Evaluation of Conflict.
The Role of Anterior Cingulate Cortex in the Affective Evaluation of Conflict.
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DOI：
10.1162/jocn_a_01023
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发表时间：
2017-01
影响因子：
3.2
通讯作者：
Egner T
中科院分区：
文献类型：
--
作者：
Braem S;King JA;Korb FM;Krebs RM;Notebaert W;Egner T
前扣带回皮质(ACC)功能的一种有影响力的理论认为，这一大脑区域在对绩效监测和控制需求的情感评估中发挥着关键作用。具体地说，要求控制的过程，如反应冲突，被ACC认为是厌恶信号，进而触发加工调整以支持回避学习。为了支持冲突被视为厌恶事件，最近的行为学研究表明，相对于一致刺激的不一致(即，冲突诱发)可以加速随后相对于积极情感图片的负面加工。在这里，我们使用功能磁共振成像(FMRI)来直接研究对负面图片和正面图片做出反应的ACC活动是否受到由冲突和任务转换条件组成的先前控制要求的调节。结果表明，在一致(相对于不一致)的实验中，负面图片相对于正面图片会引起更高的ACC激活，这表明ACC对负面图片(正面图片)的反应确实是由不一致性(一致性)实验有效地启动的。有趣的是，这种结果模式在任务重复时被观察到，但在任务交替时消失。我们的发现支持冲突导致负面情绪的观点，并首次表明这种情绪信号反映在ACC的激活中。
An influential theory of anterior cingulate cortex (ACC) function argues that this brain region plays a crucial role in the affective evaluation of performance monitoring and control demands. Specifically, control-demanding processes such as response conflict, are thought to be registered as aversive signals by the ACC, which in turn triggers processing adjustments to support avoidance-learning. In support of conflict being treated as an aversive event, recent behavioural studies demonstrated that incongruent (i.e., conflict-inducing) relative to congruent stimuli can speed up subsequent negative relative to positive affective picture processing. Here, we used functional magnetic resonance imaging (fMRI) to investigate directly whether ACC activity in response to negative versus positive pictures is modulated by preceding control demands, consisting of conflict and task-switching conditions. The results show that negative relative to positive pictures elicited higher ACC activation following congruent relative to incongruent trials, suggesting that the ACC’s response to negative (positive) pictures was indeed affectively primed by incongruent (congruent) trials. Interestingly, this pattern of results was observed on task repetitions, but disappeared on task alternations. Our findings support the proposal that conflict induces negative affect, and are the first to show that this affective signal is reflected in ACC activation.