PDF(Pubmed)
Abstract：
When watching a negative emotional movie, we differ from person to person in the ease with which we engage and the difficulty with which we disengage throughout a temporally evolving narrative. We investigated neural responses of emotional processing, by considering inter-individual synchronization in subjective emotional engagement and disengagement. The neural underpinnings of these shared responses are ideally studied in naturalistic scenarios like movie viewing, wherein individuals emotionally engage and disengage at their own time and pace throughout the course of a narrative. Despite the rich data that naturalistic designs can bring to the study, there is a challenge in determining time-resolved behavioral markers of subjective engagement and disengagement and their underlying neural responses. We used a within-subject cross-over design instructing 22 subjects to watch clips of either neutral or sad content while undergoing functional magnetic resonance imaging (fMRI). Participants watched the same movies a second time while continuously annotating the perceived emotional intensity, thus enabling the mapping of brain activity and emotional experience. Our analyses revealed that between-participant similarity in waxing (engagement) and waning (disengagement) of emotional intensity was directly related to the between-participant similarity in spatiotemporal patterns of brain activation during the movie(s). Similar patterns of engagement reflected common activation in the bilateral ventromedial prefrontal cortex, regions often involved in self-referenced evaluation and generation of negative emotions. Similar patterns of disengagement reflected common activation in central executive and default mode network regions often involved in top-down emotion regulation. Together this work helps to better understand cognitive and neural mechanisms underpinning engagement and disengagement from emotionally evocative narratives.
摘要：
当观看负面情绪电影时，我们因人而异，在我们参与的容易程度和我们在时间上不断发展的叙事中脱离的困难。我们调查了情绪处理的神经反应，通过在主观情感参与和脱离中考虑个体间的同步。这些共享反应的神经基础理想地在自然主义场景中进行研究，例如电影观看，其中个人在整个叙事过程中以自己的时间和节奏在情感上参与和脱离。尽管自然主义设计可以为研究带来丰富的数据，在确定主观参与和脱离的时间分辨行为标记及其潜在的神经反应方面存在挑战.我们使用了受试者内部交叉设计，指导22名受试者在进行功能磁共振成像（fMRI）时观看中性或悲伤内容的剪辑。参与者第二次观看同一部电影，同时不断注释感知的情感强度，从而实现大脑活动和情感体验的映射。我们的分析显示，参与者之间在情感强度的打蜡（参与）和减弱（脱离）之间的相似性与电影期间大脑激活的时空模式中的参与者之间的相似性直接相关。类似的参与模式反映了双侧腹内侧前额叶皮层的共同激活，经常参与自我参考评估和负面情绪产生的区域。类似的脱离接触模式反映了通常参与自上而下情绪调节的中央执行和默认模式网络区域的共同激活。这项工作有助于更好地理解认知和神经机制，这些机制支持从情感唤起的叙事中参与和脱离。
