EVENT-RELATED DELTA AND THETA SYNCHRONIZATION DURING EXPLICIT AND IMPLICIT EMOTION PROCESSING
EVENT-RELATED DELTA AND THETA SYNCHRONIZATION DURING EXPLICIT AND IMPLICIT EMOTION PROCESSING
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DOI：
10.1016/j.neuroscience.2009.09.057
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发表时间：
2009-12-29
期刊：
影响因子：
3.3
通讯作者：
Bocharov, A. V.
中科院分区：
文献类型：
--
作者：
Knyazev, G. G.;Slobodskoj-Plusnin, J. Y.;Bocharov, A. V.
情绪信息加工可能以两种不同的模式发生，这两种模式在意识意识中表现不同。快速在线处理涉及对显著特征的粗粒度分析，并且不代表有意识的意识；脱机处理需要数百毫秒来生成细粒度的分析，并以有意识的意识表示。这些加工模式可以用事件相关脑电图theta和delta同步作为情绪加工的标记来研究。两个实验在情绪信息呈现方式上存在差异。在外显模式下，被试被明确指示评价所呈现刺激的情绪内容；在内隐模式下，他们执行性别歧视任务。首先，我们发现在两个实验中，当“情绪”刺激出现时，θ波和δ波同步比“中性”刺激更强，在更敏感的被试中，或经历更高的情绪参与的被试比不敏感或超然的被试更强。其次，我们发现在内隐模式下，θ和δ的同步在刺激后250毫秒前的加工阶段更为明显，而在外显模式下，同步在刺激后250毫秒的加工阶段更为明显。源定位分析表明，与中性面孔相比，愤怒面孔和快乐面孔的内隐加工分别与右侧顶叶皮层和右侧脑岛较高的早期（250ms前）θ波同步有关。在左颞叶和双侧前额叶皮层，对愤怒和快乐面孔的外显处理分别与较高的后期（250毫秒后）θ同步有关。(c) 2009 ibro。Elsevier Ltd.出版。版权所有。
Emotion information processing may occur in two modes which are differently represented in conscious awareness. Fast online processing involves coarse-grained analysis of salient features, and is not represented in conscious awareness; offline processing takes hundreds of milliseconds to generate fine-grained analysis, and is represented in conscious awareness. These processing modes may be studied using event-related electroencephalogram theta and delta synchronization as a marker of emotion processing. Two experiments were conducted, which differed on the mode of emotional information presentation. In the explicit mode subjects were explicitly instructed to evaluate the emotional content of presented stimuli; in the implicit mode they performed a gender discrimination task. Firstly, we show that in both experiments theta and delta synchronization is stronger upon presentation of "emotional" than "neutral" stimuli, and in subjects who are more sensitive, or experience higher emotional involvement than in less sensitive or detached subjects. Secondly, we show that in the implicit mode theta and delta synchronization is more pronounced in an early (before 250 ms post-stimulus) processing stage, whereas in the explicit mode it is more pronounced in a later processing stage. Source localization analysis showed that implicit processing of angry and happy (relative to neutral) faces is associated with higher early (before 250 ms) theta synchronization in the right parietal cortex and the right insula, respectively. Explicit processing of angry and happy faces is associated with higher late (after 250 ms) theta synchronization in the left temporal lobe and bilateral prefrontal cortex, respectively. (C) 2009 IBRO. Published by Elsevier Ltd. All rights reserved.