The power of imagination - How anticipatory mental imagery alters perceptual processing of fearful facial expressions
The power of imagination - How anticipatory mental imagery alters perceptual processing of fearful facial expressions
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DOI：
10.1016/j.neuroimage.2010.08.034
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发表时间：
2011-01-15
期刊：
影响因子：
5.7
通讯作者：
Gruber, Oliver
中科院分区：
文献类型：
--
作者：
Diekhof, Esther K.;Kipshagen, Hanne E.;Gruber, Oliver
期望强烈地塑造了我们对世界的感知，对刺激特征的先入之见甚至可能使感觉系统产生虚幻的感知偏差。在这里，我们通过功能性磁共振成像评估了轻度恐惧面孔的预期心理意象如何产生预测偏差，主动改变对高度恐惧面孔的感知并产生减少恐惧的“幻觉”。我们发现，梭状回（FG）的预期激活受到想象中面孔的恐惧程度的调节。此外，在预期意象过程中，外侧和腹内侧前额皮质对 FG 的调节影响为感知系统随后的错误感知做好了准备。这是通过增加高阶大脑区域的感知激活来评估情感价和情境框架，同时限制自下而上的唤醒和对恐惧表达的注意力来实现的。因此，预期心理意象可能代表一种有效的先行策略，通过该策略可以显着改变情绪感知。 (C) 2010 Elsevier Inc. 保留所有权利。
Expectancies strongly shape our perception of the world and preconceptions about stimulus characteristics can even bias the sensory system for illusory percepts. Here we assessed with functional magnetic resonance imaging how anticipatory mental imagery of a mildly fearful face created a predictive bias that proactively altered perception of highly fearful faces and generated the "illusion" of reduced fearfulness. We found that anticipatory activation of the fusiform gyrus (FG) was modulated by the fearfulness of the imagined face. Further during anticipatory imagery, regulatory influences from the lateral and ventromedial prefrontal cortex on the FG primed the perceptual system for a subsequent misperception. This was achieved by increasing perceptual activation in higher-order brain regions for the evaluation of affective valence and contextual framing, while at the same time restricting bottom-up arousal and attention to fearful expressions. Anticipatory mental imagery may thus represent an effective antecedent strategy through which emotional perception can be significantly altered. (C) 2010 Elsevier Inc. All rights reserved.