Dissociation of event-related potentials indexing arousal and semantic cohesion during emotional word encoding
Dissociation of event-related potentials indexing arousal and semantic cohesion during emotional word encoding
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DOI：
10.1016/j.bandc.2006.03.008
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发表时间：
2006-10-01
影响因子：
2.5
通讯作者：
LaBar, Kevin S.
中科院分区：
文献类型：
--
作者：
Dillon, Daniel G.;Cooper, Julie J.;LaBar, Kevin S.
事件相关电位（ERP）研究表明，情绪刺激比中性刺激诱发更大幅度的晚正极性电位（LPPs）。这种效应被归因于唤醒，但情绪刺激也比未分类的中性刺激更语义连贯。ERPs被记录在编码的积极，消极，未分类的中性和分类的中性词。在LPP振幅引起的情绪与未分类的中性刺激的差异是显而易见的，从450至1000毫秒。从450至700毫秒，LPP效应中线和右半球额叶电极索引唤醒，而LPP效应在左半球中心顶叶电极索引语义的凝聚力。这种分离有助于确定情绪刺激编码的潜在过程，并表明在情绪信息处理研究中需要控制语义衔接。(c)2006年爱思唯尔公司All rights reserved.
Event-related potential (ERP) studies have shown that emotional stimuli elicit greater amplitude late positive-polarity potentials (LPPs) than neutral stimuli. This effect has been attributed to arousal, but emotional stimuli are also more semantically coherent than uncategorized neutral stimuli. ERPs were recorded during encoding of positive, negative, uncategorized neutral, and categorized neutral words. Differences in LPP amplitude elicited by emotional versus uncategorized neutral stimuli were evident from 450 to 1000 ms. From 450 to 700 ms, LPP effects at midline and right hemisphere frontal electrodes indexed arousal, whereas LPP effects at left hemisphere centro-parietal electrodes indexed semantic cohesion. This dissociation helps specify the processes underlying emotional stimulus encoding, and suggests the need to control for semantic cohesion in emotional information processing studies. (c) 2006 Elsevier Inc. All rights reserved.