PDF(Pubmed)
Abstract：
In everyday life, people need to respond appropriately to many types of emotional stimuli. Here, we investigate whether human occipital-temporal cortex (OTC) shows co-representation of the semantic category and affective content of visual stimuli. We also explore whether OTC transformation of semantic and affective features extracts information of value for guiding behavior. Participants viewed 1620 emotional natural images while functional magnetic resonance imaging data were acquired. Using voxel-wise modeling we show widespread tuning to semantic and affective image features across OTC. The top three principal components underlying OTC voxel-wise responses to image features encoded stimulus animacy, stimulus arousal and interactions of animacy with stimulus valence and arousal. At low to moderate dimensionality, OTC tuning patterns predicted behavioral responses linked to each image better than regressors directly based on image features. This is consistent with OTC representing stimulus semantic category and affective content in a manner suited to guiding behavior.
摘要：
在日常生活中,人们需要对许多类型的情绪刺激做出适当的反应。这里,我们研究了人类枕部-颞叶皮层（OTC）是否显示了视觉刺激的语义类别和情感内容的共同表示。我们还探讨了语义和情感特征的OTC转换是否可以提取具有指导行为价值的信息。参与者观看了1620张情绪自然图像，同时获取了功能磁共振成像数据。使用逐体素建模，我们展示了跨OTC对语义和情感图像特征的广泛调整。对编码刺激动画的图像特征的OTC体素响应的前三个主要成分，刺激唤醒和动物与刺激效价和唤醒的相互作用。在低到中等维度，OTC调整模式比直接基于图像特征的回归变量更好地预测与每个图像相关的行为响应。这与OTC以适合引导行为的方式表示刺激语义类别和情感内容是一致的。
