Effects of social and emotional context on neural activation and synchrony during movie viewing,Human Brain Mapping

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Effects of social and emotional context on neural activation and synchrony during movie viewing
Human Brain Mapping ( IF 3.5 ) Pub Date : 2021-09-23 , DOI: 10.1002/hbm.25669
Sarah L Dziura ₁ , Junaid S Merchant ₁ , Diana Alkire ₁ , Adnan Rashid ₂ , Deena Shariq ₁ , Dustin Moraczewski ₃ , Elizabeth Redcay ₁

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Sharing emotional experiences impacts how we perceive and interact with the world, but the neural mechanisms that support this sharing are not well characterized. In this study, participants (N = 52) watched videos in an MRI scanner in the presence of an unfamiliar peer. Videos varied in valence and social context (i.e., participants believed their partner was viewing the same (joint condition) or a different (solo condition) video). Reported togetherness increased during positive videos regardless of social condition, indicating that positive contexts may lessen the experience of being alone. Two analysis approaches were used to examine both sustained neural activity averaged over time and dynamic synchrony throughout the videos. Both approaches revealed clusters in the medial prefrontal cortex that were more responsive to the joint condition. We observed a time-averaged social-emotion interaction in the ventromedial prefrontal cortex, although this region did not demonstrate synchrony effects. Alternatively, social-emotion interactions in the amygdala and superior temporal sulcus showed greater neural synchrony in the joint compared to solo conditions during positive videos, but the opposite pattern for negative videos. These findings suggest that positive stimuli may be more salient when experienced together, suggesting a mechanism for forming social bonds.

中文翻译：

社会和情感背景对观影过程中神经激活和同步性的影响

分享情感体验会影响我们感知世界和与世界互动的方式，但支持这种分享的神经机制并没有得到很好的表征。在这项研究中，参与者（N = 52) 在不熟悉的同伴在场的情况下，在 MRI 扫描仪中观看视频。视频的效价和社会背景各不相同（即参与者认为他们的伴侣正在观看相同的（联合条件）或不同的（单独条件）视频）。无论社会条件如何，在积极的视频中报告的团结性都会增加，这表明积极的环境可能会减少独处的体验。两种分析方法用于检查视频中随时间平均的持续神经活动和动态同步。两种方法都揭示了内侧前额叶皮层中对关节状况更敏感的簇。我们在腹内侧前额叶皮层观察到时间平均的社会情绪相互作用，尽管该区域没有表现出同步效应。或者，与正面视频中的单独条件相比，杏仁核和颞上沟中的社交情绪相互作用在关节中显示出更大的神经同步性，但在负面视频中则相反。这些发现表明，积极的刺激可能在一起经历时更为显着，这表明了形成社会纽带的机制。

更新日期：2021-11-17

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