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背侧运动敏感区域中情绪表征的跨主体共性。

Cross-Subject Commonality of Emotion Representations in Dorsal Motion-Sensitive Areas.

作者信息

Liang Yin, Liu Baolin

机构信息

Faculty of Information Technology, College of Computer Science and Technology, Beijing Artificial Intelligence Institute, Beijing University of Technology, Beijing, China.

School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing, China.

出版信息

Front Neurosci. 2020 Oct 14;14:567797. doi: 10.3389/fnins.2020.567797. eCollection 2020.

Abstract

Emotion perception is a crucial question in cognitive neuroscience and the underlying neural substrates have been the subject of intense study. One of our previous studies demonstrated that motion-sensitive areas are involved in the perception of facial expressions. However, it remains unclear whether emotions perceived from whole-person stimuli can be decoded from the motion-sensitive areas. In addition, if emotions are represented in the motion-sensitive areas, we may further ask whether the representations of emotions in the motion-sensitive areas can be shared across individual subjects. To address these questions, this study collected neural images while participants viewed emotions (joy, anger, and fear) from videos of whole-person expressions (contained both face and body parts) in a block-design functional magnetic resonance imaging (fMRI) experiment. Multivariate pattern analysis (MVPA) was conducted to explore the emotion decoding performance in individual-defined dorsal motion-sensitive regions of interest (ROIs). Results revealed that emotions could be successfully decoded from motion-sensitive ROIs with statistically significant classification accuracies for three emotions as well as positive versus negative emotions. Moreover, results from the cross-subject classification analysis showed that a person's emotion representation could be robustly predicted by others' emotion representations in motion-sensitive areas. Together, these results reveal that emotions are represented in dorsal motion-sensitive areas and that the representation of emotions is consistent across subjects. Our findings provide new evidence of the involvement of motion-sensitive areas in the emotion decoding, and further suggest that there exists a common emotion code in the motion-sensitive areas across individual subjects.

摘要

情绪感知是认知神经科学中的一个关键问题,其潜在的神经基质一直是深入研究的主题。我们之前的一项研究表明,运动敏感区域参与面部表情的感知。然而,从整个人的刺激中感知到的情绪是否能从运动敏感区域解码仍不清楚。此外,如果情绪在运动敏感区域有表征,我们可能会进一步问,运动敏感区域中情绪的表征是否能在个体受试者之间共享。为了解决这些问题,本研究在一项组块设计功能磁共振成像(fMRI)实验中,当参与者观看来自整个人表情视频(包含面部和身体部位)中的情绪(喜悦、愤怒和恐惧)时收集神经图像。进行多变量模式分析(MVPA)以探索在个体定义的背部运动敏感感兴趣区域(ROI)中的情绪解码性能。结果显示,情绪能够从运动敏感ROI中成功解码,对于三种情绪以及积极与消极情绪都具有统计学上显著的分类准确率。此外,跨受试者分类分析的结果表明,一个人的情绪表征能够被运动敏感区域中其他人的情绪表征稳健地预测。总之,这些结果揭示情绪在背部运动敏感区域有表征,并且情绪表征在受试者之间是一致的。我们的发现为运动敏感区域参与情绪解码提供了新证据,并进一步表明在个体受试者的运动敏感区域中存在一种共同的情绪编码。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b3c1/7591793/c059ae2df544/fnins-14-567797-g001.jpg

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