Variation is the Norm: Brain State Dynamics Evoked By Emotional Video Clips.
Variation is the Norm: Brain State Dynamics Evoked By Emotional Video Clips.
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DOI：
10.1109/embc46164.2021.9630852
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发表时间：
2021-11
期刊：
影响因子：
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通讯作者：
Erdogmus D
中科院分区：
文献类型：
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作者：
Singh A;Westlin C;Eisenbarth H;Reynolds Losin EA;Andrews-Hanna JR;Wager TD;Satpute AB;Barrett LF;Brooks DH;Erdogmus D
在过去的几十年里，情绪研究一直试图确定一种“生物标记”或一致的大脑活动模式来表征单一类别的情绪（例如恐惧），无论个人和背景如何，该类别的所有实例都将保持一致。在这项研究中，我们研究了当人们观看被选择来唤起特定情绪类别实例的视频剪辑时情绪体验的变化而不是一致性。具体来说，我们开发了一种顺序概率方法来模拟参与者观看视频期间大脑活动的时间动态。我们将这些剪辑期间的大脑状态描述为血氧水平依赖（BOLD）信号模式的状态转换之间的不同状态占用周期。我们发现观看同一视频的个体之间的状态占据概率分布存在显着差异，这支持了这样的假设：当涉及到情绪体验的大脑关联时，差异可能确实是常态。
For the last several decades, emotion research has attempted to identify a “biomarker” or consistent pattern of brain activity to characterize a single category of emotion (e.g., fear) that will remain consistent across all instances of that category, regardless of individual and context. In this study, we investigated variation rather than consistency during emotional experiences while people watched video clips chosen to evoke instances of specific emotion categories. Specifically, we developed a sequential probabilistic approach to model the temporal dynamics in a participant’s brain activity during video viewing. We characterized brain states during these clips as distinct state occupancy periods between state transitions in blood oxygen level dependent (BOLD) signal patterns. We found substantial variation in the state occupancy probability distributions across individuals watching the same video, supporting the hypothesis that when it comes to the brain correlates of emotional experience, variation may indeed be the norm.