Processing of unattended facial emotions: A visual mismatch negativity study
Processing of unattended facial emotions: A visual mismatch negativity study
复制标题
DOI：
10.1016/j.neuroimage.2011.10.041
复制
发表时间：
2012-02-01
期刊：
影响因子：
5.7
通讯作者：
Czigler, Istvan
中科院分区：
文献类型：
--
作者：
Stefanics, Gabor;Csukly, Gabor;Czigler, Istvan
面部情绪表达了我们的内在状态，是社会交往的基础。在这里，我们探讨是否重复的无人值守的面部情绪建立了一个预测表示经常遇到的情绪在视觉系统中。参与者（n = 24）提出了周边与面部刺激表达的情绪，而他们执行的视觉检测任务，在中心的视野。面部刺激由四张不同身份的面孔组成，但表达相同的情绪（快乐或恐惧）。面部刺激以oddball序列的块呈现（标准情绪：p = 0.9，异常情绪：p = 0.1）。分别在情绪偏离和情绪标准时比较同一情绪的事件相关电位（ERP）。我们发现视觉失配负波（vMMN）反应无人值守的异常情绪在170-360毫秒刺激后的范围内，在双边枕颞部位。我们的研究结果表明，在视野的外围呈现的无人值守的面孔的情感内容的信息被快速处理和存储在一个预测的记忆表示的视觉系统。我们还发现，差异处理的异常恐惧的面孔已经开始在70-120毫秒后刺激发作的证据。这一发现显示了在无人看管的条件下的“消极偏见”。在195-275 ms和360-390 ms的时间间隔内，对恐惧异常者的差异处理在右半球更为明显，而对快乐异常者的处理在360-390 ms的时间间隔内在左半球引起了更大的差异反应，表明大脑半球对积极和消极情感的自动处理有差异的专门化。(C)2011 Elsevier Inc. All rights reserved.
Facial emotions express our internal states and are fundamental in social interactions. Here we explore whether the repetition of unattended facial emotions builds up a predictive representation of frequently encountered emotions in the visual system. Participants (n = 24) were presented peripherally with facial stimuli expressing emotions while they performed a visual detection task presented in the center of the visual field. Facial stimuli consisted of four faces of different identity, but expressed the same emotion (happy or fearful). Facial stimuli were presented in blocks of oddball sequence (standard emotion: p = 0.9, deviant emotion: p = 0.1). Event-related potentials (ERPs) to the same emotions were compared when the emotions were deviant and standard, respectively. We found visual mismatch negativity (vMMN) responses to unattended deviant emotions in the 170-360 ms post-stimulus range over bilateral occipito-temporal sites. Our results demonstrate that information about the emotional content of unattended faces presented at the periphery of the visual field is rapidly processed and stored in a predictive memory representation by the visual system. We also found evidence that differential processing of deviant fearful faces starts already at 70-120 ms after stimulus onset. This finding shows a 'negativity bias' under unattended conditions. Differential processing of fearful deviants were more pronounced in the right hemisphere in the 195-275 ms and 360-390 ms intervals, whereas processing of happy deviants evoked larger differential response in the left hemisphere in the 360-390 ms range, indicating differential hemispheric specialization for automatic processing of positive and negative affect. (C) 2011 Elsevier Inc. All rights reserved.