Unattended emotional faces elicit early lateralized amygdala-frontal and fusiform activations
Unattended emotional faces elicit early lateralized amygdala-frontal and fusiform activations
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DOI：
10.1016/j.neuroimage.2009.12.093
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发表时间：
2010-04-01
期刊：
影响因子：
5.7
通讯作者：
Taylor, Margot J.
中科院分区：
文献类型：
--
作者：
Hung, Yuwen;Smith, Mary Lou;Taylor, Margot J.
人类对潜在威胁的适应性行为涉及专门的大脑反应，允许对感官输入进行快速和反射性处理，并进行更直接的处理，以便以后评估威胁的性质。众所周知，杏仁核在情绪处理中起着关键作用。这表明，杏仁核处理威胁相关的信息，通过一个快速的皮层下路线和较慢的皮层反馈。缺乏支持这一假设的人类数据证据。本研究探讨了事件相关的神经反应过程中的面部情绪在无人值守的hemifield使用脑磁图（MEG），并发现激活的杏仁核和前扣带皮层恐惧早在100毫秒。右杏仁核表现出时间分离的激活，从不同的视野输入，这表明早期皮层下与后来的皮层处理恐惧。我们还观察到不对称的梭状活动与侧化前馈处理的面孔在视觉腹侧流。结果表明，快速，自动和并行处理无人值守的情绪面孔，提供了重要的见解，具体的和分离的神经通路的情绪和面孔知觉。(C)2010年爱思唯尔公司All rights reserved.
Human adaptive behaviour to potential threats involves specialized brain responses allowing rapid and reflexive processing of the sensory input and a more directed processing for later evaluation of the nature of the threat. The amygdalae are known to play a key role in emotion processing. It is suggested that the amygdalae process threat-related information through a fast subcortical route and slower cortical feedback. Evidence from human data supporting this hypothesis is lacking. The present study investigated event-related neural responses during processing of facial emotions in the unattended hemifield using magnetoencephalography (MEG) and found activations of the amygdala and anterior cingulate cortex to fear as early as 100 ms. The right amygdala exhibited temporally dissociated activations to input from different visual fields, suggesting early subcortical versus later cortical processing of fear. We also observed asymmetrical fusiform activity related to lateralized feed-forward processing of the faces in the visual-ventral stream. Results demonstrate fast, automatic, and parallel processing of unattended emotional faces, providing important insights into the specific and dissociated neural pathways in emotion and face perception. (C) 2010 Elsevier Inc. All rights reserved.