Emotional expressions evoke a differential response in the fusiform face area.
Emotional expressions evoke a differential response in the fusiform face area.
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DOI：
10.3389/fnhum.2013.00692
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发表时间：
2013
影响因子：
2.9
通讯作者：
Kim J
中科院分区：
文献类型：
--
作者：
Harry B;Williams MA;Davis C;Kim J
人们普遍认为，梭状面孔区（FFA），专门用于面部感知的大脑区域，不参与处理情绪表达。这个假设是基于这样的命题，即FFA参与面部识别，并且只处理由于头部运动、说话和表达情感而在变化中不变的特征。本研究通过功能性磁共振成像和大脑解码分析技术（n = 11）检查人类FFA中的反应是否随情绪表达而变化来验证这一命题。一个与所有的分类分析表明，大多数的情绪表达，参与者认为可以可靠地预测的神经模式的活动在左侧和右侧FFA，这表明不同的情绪表达的感知招募部分非重叠的神经机制。此外，情绪表达也可以从早期视觉皮层（EVC）的活动模式中解码，这表明视网膜皮层也对情绪表达表现出不同的反应。这些结果对FFA参与表情不变面部处理的想法表示怀疑，相反，表明情绪表达在整个枕叶和后颞叶皮层引起部分去相关信号。
It is widely assumed that the fusiform face area (FFA), a brain region specialized for face perception, is not involved in processing emotional expressions. This assumption is based on the proposition that the FFA is involved in face identification and only processes features that are invariant across changes due to head movements, speaking and expressing emotions. The present study tested this proposition by examining whether the response in the human FFA varies across emotional expressions with functional magnetic resonance imaging and brain decoding analysis techniques (n = 11). A one vs. all classification analysis showed that most emotional expressions that participants perceived could be reliably predicted from the neural pattern of activity in left and the right FFA, suggesting that the perception of different emotional expressions recruit partially non-overlapping neural mechanisms. In addition, emotional expressions could also be decoded from the pattern of activity in the early visual cortex (EVC), indicating that retinotopic cortex also shows a differential response to emotional expressions. These results cast doubt on the idea that the FFA is involved in expression invariant face processing, and instead indicate that emotional expressions evoke partially de-correlated signals throughout occipital and posterior temporal cortex.
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