Differentiating neural responses to emotional pictures: Evidence from temporal-spatial PCA
Differentiating neural responses to emotional pictures: Evidence from temporal-spatial PCA
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DOI：
10.1111/j.1469-8986.2009.00796.x
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发表时间：
2009-05-01
期刊：
影响因子：
3.7
通讯作者：
Dien, Joseph
中科院分区：
文献类型：
--
作者：
Foti, Dan;Hajcak, Greg;Dien, Joseph
与情绪刺激受到优先关注和知觉处理的观点一致，许多事件相关电位（ERP）成分似乎对情绪刺激敏感。为了区分对情绪刺激和中性刺激敏感的成分，当前的研究利用时空主成分分析来分析大样本 (N=82) 中的 ERP，同时被动地观看愉快、中性和不愉快的图像。确定了几个对情绪刺激敏感的因素——对应于 N1、早期后消极性 (EPN) 和 P3；出现了类似于晚期正电位（LPP）的多种因素。结果表明，N1 代表最早受情绪刺激调节的成分； EPN 和 LPP 代表独特的组件；头皮记录的 LPP 似乎包括类似 P3 的阳性以及枕骨和中央记录部位的额外阳性。
Consistent with the notion that emotional stimuli receive preferential attention and perceptual processing, many event-related potential (ERP) components appear sensitive to emotional stimuli. In an effort to differentiate components that are sensitive to emotional versus neutral stimuli, the current study utilized temporospatial principal components analysis to analyze ERPs from a large sample (N=82) while pleasant, neutral, and unpleasant images were passively viewed. Several factors sensitive to emotional stimuli were identified-corresponding to the N1, early posterior negativity (EPN), and P3; multiple factors resembling the late positive potential (LPP) emerged. Results indicate that the N1 represents the earliest component modulated by emotional stimuli; the EPN and the LPP represent unique components; the scalp-recorded LPP appears to include a P3-like positivity as well as additional positivities at occipital and central recording sites.