Visual mismatch negativity elicited by facial expressions under non-attentional condition
Visual mismatch negativity elicited by facial expressions under non-attentional condition
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DOI：
10.1016/j.neulet.2006.09.081
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发表时间：
2006-12-20
影响因子：
2.5
通讯作者：
Li, Jing
中科院分区：
文献类型：
--
作者：
Zhao, Lun;Li, Jing
采用一种改进的“跨通道延迟反应”范式，研究了在没有集中注意面孔的情况下，面孔表情的假设加工。在音调和反应命令信号(微弱的滴答声)之间的时间间隔内，受试者会出现中性、高兴和悲伤的表情，而受试者则被指示尽可能快速准确地辨别音调的位置，并忽略这些表情。80%的受试者表现出中性的表情，而其余的受试者则分别表现出高兴和悲伤的表情--10%。表情失配负性(EMMN)是从悲伤面孔或开心面孔诱发的事件相关电位中减去中性面孔诱发的ERP得到的。EMMN从大约120毫秒(悲伤)和110毫秒(快乐)开始，持续到刺激后的430毫秒(悲伤)和360毫秒(快乐)。悲伤面孔诱发的EMMN比快乐面孔诱发的EMMN更负。两种EMMN均分布于后脑区，且右侧的覆盖面积大于左侧(尤其是快乐的EMMN)。(C)2006爱思唯尔爱尔兰有限公司。保留所有权利。
A modified "cross-modal delayed response" paradigm was used to investigate putative processing of face expression in the absence of focused attention to the face. Neutral, happy and sad faces were presented during intervals occurring between a tone and a response imperative signal (a faint click), while subjects were instructed to discriminate the location of the tone as quickly and accurately as possible and to ignore the faces. A neutral face was presented in 80% of the trials whereas the happy and sad faces were presented in the remaining trials - 10%, respectively. Expression mismatch negativity (EMMN) was obtained by subtracting the ERP elicited by neutral faces from that elicited by sad faces or happy faces. The EMMN started from around 120 ms (sad) and 110 ms (happy) lasting up to 430 ms (sad) and 360 ms (happy) post-stimulus. The EMMN elicited by sad faces was more negative than that elicited by happy faces. Both EMMNs distributed over posterior areas and covered larger areas in the right than in the left hemisphere sites (especially for happy EMMN). (c) 2006 Elsevier Ireland Ltd. All rights reserved.