Arousal effect on emotional face comprehension Frequency band changes in different time intervals
Arousal effect on emotional face comprehension Frequency band changes in different time intervals
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DOI：
10.1016/j.physbeh.2009.03.023
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发表时间：
2009-06-22
影响因子：
2.9
通讯作者：
Pozzoli, Uberto
中科院分区：
文献类型：
--
作者：
Balconi, Michela;Pozzoli, Uberto
本研究旨在探讨在不同刺激后时间间隔（50 ~ 450 ms）内对情绪面孔的反应中δ、θ、α -1、α -2和γ频段的调制。20名成年人观看了情绪激动（快乐、悲伤、愤怒、恐惧）或中性的面孔。脑电结果表明，人脸的动机显著性可以调制频带，特别是theta和gamma。此外，伽马可以随面部表情的唤起程度（高或低）而变化。方差分析和回归分析表明，gamma和theta的情绪分辨主要在150-250个时间间隔内观察到，一致性分析也表明，对于情绪刺激，它更多地分布在头皮的右前侧（theta）或右侧（gamma），而delta在250-350个时间间隔内增加最多，并且在所有刺激类型中都更后侧（顶叶部位）分布。我们提出，波段调制对处理情绪面孔的变化作出反应。而且，delta反映刺激的更新，theta反应面部的情感意义，gamma反映面部表情唤起能力的差异。(C) 2009爱思唯尔公司版权所有。
The study aimed to explore the modulation of frequency bands (delta, theta, alpha-1 and alpha-2, and gamma) in response to emotional face within different post-stimulus time intervals (50-450 ms). Twenty adults looked at emotional (happy, sad, angry, fearful) or neutral faces. EEG results showed that motivational significance of face can modulate frequency bands, specifically for theta and gamma. Moreover, gamma can be varied related to degree of arousing feature (high or low) of facial expression. As a function of time, ANOVA and regression analysis revealed that emotional discrimination by gamma and theta is observable mainly within 150-250 time interval and, as revealed also by coherence analysis, that it is more distributed on the anterior-right (theta) or right (gamma) side of the scalp for the emotional stimuli, whereas delta is maximally increased within 250-350 interval and it is more posteriorly (parietal site) distributed for all the stimulus type. We proposed that band modulations respond to variations in processing emotional face. and, whereas delta reflects updating of the stimulus, and theta responds to the emotional significance of face, gamma reflects differences in the arousing power of facial expression. (C) 2009 Elsevier Inc. All rights reserved.