Integrative Processing of Touch and Affect in Social Perception: An fMRI Study
Integrative Processing of Touch and Affect in Social Perception: An fMRI Study
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DOI：
10.3389/gnhum.2016.00209
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发表时间：
2016-05-10
影响因子：
2.9
通讯作者：
Gallese, Vittorio
中科院分区：
文献类型：
--
作者：
Ebisch, Sjoerd J. H.;Salone, Anatolia;Gallese, Vittorio
社会知觉通常采用多种信息来源。本研究旨在探讨情感社会信号的整合加工。在涉及动态视觉刺激的社会知觉任务中，对26名健康成人进行了任务相关和无任务功能磁共振成像，同时描述了情绪和触觉的面部表情，这些表情可能是一致的，也可能是不一致的。由情感效价、抑制性自上而下影响、跨模态整合和冲突处理引起的混淆效应被最小化。结果表明，与不一致的刺激相比，一致的知觉在左杏仁核、双侧后扣带皮层和左顶叶上皮层等脑区引起的神经活动增强。这些一致性效应并没有随着情绪或感觉的变化而变化。一项与任务相关的互补功能相互作用分析初步表明，杏仁核的活动依赖于梭状回和PCC先前的加工阶段。研究结果支持了杏仁核和PCC对来自多种身体来源（感觉-情感信息）的关于他人感受的社会信息的整合加工。考虑到在一个独立的参与者样本中，一致的刺激也被判断为更自我相关和更熟悉的个人经验，我们推测这种整合加工可能是由外部刺激与自我经验的联系介导的。最后，在无任务状态下，杏仁核和PCC之间的内在功能连接对杏仁核任务相关反应的预测暗示了个体对社会刺激内容整合加工倾向的神经功能基础。
Social perception commonly employs multiple sources of information. The present study aimed at investigating the integrative processing of affective social signals. Task related and task-free functional magnetic resonance imaging was performed in 26 healthy adult participants during a social perception task concerning dynamic visual stimuli simultaneously depicting facial expressions of emotion and tactile sensations that could be either congruent or incongruent. Confounding effects due to affective valence, inhibitory top down influences, cross-modal integration, and conflict processing were minimized. The results showed that the perception of congruent, compared to incongruent stimuli, elicited enhanced neural activity in a set of brain regions including left amygdala, bilateral posterior cingulate cortex (PCC), and left superior parietal cortex. These congruency effects did not differ as a function of emotion or sensation. A complementary task-related functional interaction analysis preliminarily suggested that amygdala activity depended on previous processing stages in fusiform gyrus and PCC. The findings provide support for the integrative processing of social information about others' feelings from manifold bodily sources (sensory-affective information) in amygdala and PCC. Given that the congruent stimuli were also judged as being more self-related and more familiar in terms of personal experience in an independent sample of participants, we speculate that such integrative processing might be mediated by the linking of external stimuli with self-experience. Finally, the prediction of task-related responses in amygdala by intrinsic functional connectivity between amygdala and PCC during a task-free state implies a neuro-functional basis for an individual predisposition for the integrative processing of social stimulus content.