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Brain response during the M170 time interval is sensitive to socially relevant information

机译:M170时间间隔内的大脑反应对社交相关信息敏感

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Deciphering the social meaning of facial displays is a highly complex neurological process. The M170, an event related field component of MEG recording, like its EEG counterpart N170, was repeatedly shown to be associated with structural encoding of faces. However, the scope of information encoded during the M170 time window is still being debated. We investigated the neuronal origin of facial processing of integrated social rank cues (SRCs) and emotional facial expressions (EFEs) during the M170 time interval. Participants viewed integrated facial displays of emotion (happy, angry, neutral) and SRCs (indicated by upward, downward, or straight head tilts). We found that the activity during the M170 time window is sensitive to both EFEs and SRCs. Specifically, highly prominent activation was observed in response to SRC connoting dominance as compared to submissive or egalitarian head cues. Interestingly, the processing of EFEs and SRCs appeared to rely on different circuitry. Our findings suggest that vertical head tilts are processed not only for their sheer structural variance, but as social information. Exploring the temporal unfolding and brain localization of non-verbal cues processing may assist in understanding the functioning of the social rank biobehavioral system. (C) 2015 Elsevier Ltd. All rights reserved.
机译:解读面部显示器的社会意义是一个高度复杂的神经系统过程。 M170记录与事件记录有关的事件组件M170(如其EEG对应物N170)被反复显示与人脸的结构编码相关。但是,在M170时间窗口内编码的信息范围仍在争论中。我们调查了M170时间间隔内综合社交等级线索(SRC)和情绪面部表情(EFE)的面部处理的神经元起源。参与者查看了情绪(开心,生气,中立)和SRC(以向上,向下或直立的头倾斜表示)的综合面部表情。我们发现,M170时间窗口内的活动对EFE和SRC都敏感。具体而言,与顺从或均等的头提示相比,在响应SRC的优势时观察到了非常突出的激活。有趣的是,EFE和SRC的处理似乎依赖于不同的电路。我们的发现表明,垂直头倾斜不仅是因为其结构上的差异而被处理,而且还被当作社会信息来处理。探索非语言线索处理的时间展开和大脑定位可能有助于理解社会等级生物行为系统的功能。 (C)2015 Elsevier Ltd.保留所有权利。

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