中国临床心理学杂志

注意对冲突监测事件相关电位N270的影响

作者：王惠军王玉平崔莉莉田书娟王得泉

分类号：R395.9

出版年,卷(期):页码：2001,9(1):1-4

摘要：

目的：探讨注意对冲突监测事件相关电位N270的影响。方法：30名健康志愿者分成两组，一组人判断连续呈现的一对数字的颜色是否相同，不考虑数值(注意颜色)；另一组人判断连续呈现的一对数字的数值是否相同，不考虑颜色(注意数值)，在头皮同步记录事件相关电位。结果：颜色不同和/或数值不同的数字对均可在第二个数字呈现后引起事件相关电位N270，颜色和数值完全相同的数字对则不引起该负波。与不被主动注意状态相比，刺激特征冲突被注意时引出的N270波幅更高，持续时间更长，起始潜伏期不变。结论：冲突监测系统的启动不受注意影响，而一旦启动后则受到注意系统的调节。

Objective:To examine influences of attention on the conflict monitoring system. Methods:Thirty normal adults participated in the matching-to-sample task. They were divided into two subgroups. One subgroup was required to attend to the color while ignoring the value attribute of a number pair. The other subgroup was required to attend to the value while ignoring the color attribute of a number pair. Subjects were asked to press one of the two buttons according to whether the two digits were identical in the attended attribute and event-related potentials were recorded on their scalps. Results: A N270 component of event-related potential was recorded to the conflicting stimulus pairs but not to the matching pairs. The amplitude of N270 increased and its duration prolonged under attended condition. However, its onset latency showed no significant changes. Conclusion: The conflict monitoring process is automatically initiated and then regulated and enhanced by the attention control system.

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参考文献：

[1] Botvinick M, Nystrom LE, Flssell K, et al. Conflict monitoring versus selection-for-action in anterior cingulate cortex. Nature,1999,402:179-181
[2] Carter CS, Braver TS, Barch DM, et al. Anterior cingulate cortex, error detection, and the online monitoring of performance. Science,1998,280:747-749
[3] Kong J, Wang Y, Zhang W, et al. Event-related brain potentials elicited by a number discrimination task. Neuroreport,2000,11:1195-1197
[4] Cui L, Wang Y, Wang H, et al. Human brain sub-systems for discrimination of visual shapes. Neuroreport,2000,11, in press
[5] Corbetta M, Miezin FM, Dobmeyer S, et al. Selective and divided attention during visual discrimination of shape, color, and speed: functional anatomy by positron emission tomography. Journal of Neuroscience,1991,11:2383-2402
[6] Haxby JV, Grady CL, Horwitz B, et al. Dissociation of object and spatial visual processing pathways in human extrastriate cortex. Proceedings of the National Academy of Sciences of the United States of America,1991,88:1621-1625
[7] Braitman DJ. Activity of neurons in monkey posterior temporal cortex during multidimensional visual discrimination tasks. Brain Research,1984,307:17-28
[8] Novak GP, Ritter W, Vaughan HG, et al. Differentiation of negative event-related potentials in an auditory discrimination task. Electroencephalography and Clinical Neurophysiology,1990,75:255-275
[9] Harter MR, Aine CJ, Schroeder C. Hemispheric differences in the neural processing of stimulus location and type: Effects of selective attention on visual evoked potentials. Neuropsychologia,1982,20:421-438
[10] Eriksen BA, Hoffman JE. Selective attention: Noise suppression or signal enhancement? Bulletin， Psychonomic Society,1974,4:587-589
[11] Dallas M, Merikle PM. Semantic processing of non-attended visual information. Canadian Journal of Psychology,1976,30(1):15-21
[12] Nobre A C, Allison T, McCarthy G. Modulation of human extrastriate visual processing by selective attention to colours and words. Brain,1998,121:1357-1368

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