Modulations of the visual N1 component of event-related potentials by central and peripheral cueing
Modulations of the visual N1 component of event-related potentials by central and peripheral cueing
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DOI：
10.1016/j.clinph.2004.11.013
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发表时间：
2005-04-01
影响因子：
4.7
通讯作者：
Cadaveira, F
中科院分区：
文献类型：
--
作者：
Doallo, S;Lorenzo-López, L;Cadaveira, F
目的：本研究旨在探讨中枢和外周线索对事件相关电位（ERP）NI成分的影响及其时程。方法：当参与者对目标条的高度进行辨别任务时，记录ERP，这些目标条在信息中心，信息外围或非信息外围线索之后呈现，刺激起始时间（SOA）为100，300、500或700 ms。结果：外周线索（信息性和非信息性）在提示起始后300 ms对NI产生了更强的提示有效性效应，而中枢提示在500 ms SOA时对N1产生了更持久的有效性效应，随后产生了更强的效应。结果表明，中枢线索和外周线索对N1成分所反映的加工水平均有影响，但影响的时程存在差异。注意定向在响应中央线索N1的持续有效性的影响，相对于更短暂的激活的过程中所反映的NI有效性的影响，在此周边cueingtask.Significance：本研究提供了一个详细的主题内分析的时间过程中的影响，中央和周边线索N1。(c)2004年国际临床神经生理学联合会。由Elsevier爱尔兰有限公司出版。保留所有权利。
Objective: The aim of this study is to investigate the effects of the central and peripheral cueing on NI component of the event-related potentials (ERPs) and the time course of these effects.Methods: ERPs were recorded while participants performed a discrimination task on the height of target bars, which were presented after informative-central, informative-peripheral or uninformative-peripheral cues with stimulus onset asynchronies (SOAs) of 100, 300, 500 or 700 ms.Results: Peripheral cues (informative and uninformative) elicited stronger effects of cue validity on NI 300 ms after cue onset, whereas central cues led to a more sustained validity effect on N1, with later stronger effects, at 500 ms SOA.Conclusions: The present data showed that central and peripheral cues affected to the level of processing reflected by the N1 component, but there were differences in the time course of these effects. Attentional orienting in response to central cueing resulted in a sustained validity effect on N1, relative to the more transitory activation of the process reflected by the NI validity effect in this peripheral cueing task.Significance: This study provides a detailed within-subject analysis of the time course of the effects of central and peripheral cueing on N1. (c) 2004 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.