EEG correlates (event-related desynchronization) of emotional face elaboration: A temporal analysis
EEG correlates (event-related desynchronization) of emotional face elaboration: A temporal analysis
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DOI：
10.1016/j.neulet.2005.09.004
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发表时间：
2006-01-09
影响因子：
2.5
通讯作者：
Lucchiari, C
中科院分区：
文献类型：
--
作者：
Balconi, M;Lucchiari, C
进行了EEG频带分析，以探讨在不同的刺激后时间间隔（50-150; 150-250; 250-350;和350- 450 ms）期间脑振荡（δ，θ，α和β）对情绪面孔理解的意义。这项研究是在20名成年人身上进行的，他们看了情绪化的（快乐，悲伤，愤怒，恐惧）或中性的面孔。结果表明，刺激的动机意义可以调节δ和θ频段内的功率同步（事件相关去同步化（ERD）降低）。我们认为，δ和θ反应的情绪面孔加工阶段的变化：而δ反映了刺激的更新，θ反应的情绪意义的面孔。结果表明，情绪辨别的theta主要是在150-250的时间间隔内观察到的，它更多地分布在前部区域，而delta是最大的同步在250-350的时间间隔内，更向后分布的所有刺激类型。最后，在情绪面孔理解过程中，研究人员发现西塔大脑半球处于优势地位。(C)2005爱思唯尔爱尔兰有限公司保留所有战斗。
An EEG frequency band analysis was conducted, in order to explore the significance of brain oscillations (delta, theta, alpha and beta) for emotional face comprehension during different post-stimulus time intervals (50-150; 150-250; 250-350; and 350-450ms). The study was conducted on twenty adults who looked at emotional (happy, sad, angry, fearful) or neutral faces. The results showed that motivational significance of the stimulus can modulate the power synchronization (event-related desynchronization (ERD) decrease) within the frequency band of delta and theta. We propose that delta and theta respond to variations in processing stage of emotional face: whereas, delta reflects updating of the stimulus, theta responds to the emotional significance of face. The findings revealed that emotional discrimination by theta is observable mainly within 150-250 time interval and that it is more distributed on anterior regions, whereas delta is maximally synchronized within 250-350 interval and more posteriorly distributed for all the stimulus type. Finally, a right-hemisphere dominance was found for theta during emotional face comprehension. (C) 2005 Elsevier Ireland Ltd. All fights reserved.