SELECTIVE ATTENTION EFFECTS ON SOMATOSENSORY EVENT-RELATED POTENTIALS
SELECTIVE ATTENTION EFFECTS ON SOMATOSENSORY EVENT-RELATED POTENTIALS
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DOI：
10.1111/j.1749-6632.1984.tb23542.x
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发表时间：
1984-01-01
影响因子：
5.2
通讯作者：
MICHIE, PT
中科院分区：
文献类型：
--
作者：
MICHIE, PT
研究了选择性注意效应对躯体感觉事件相关脑电位(ERPs)的性质和头皮分布以及投递率对8例SS(平均年龄21岁)的影响。刺激由恒流脉冲(.5毫秒持续时间)传递到右手和左手食指的中指和远指骨的掌侧表面。每个手指都会受到弱电击(标准电击)或强电击(目标电击)。刺激间期根据300毫秒的周期而不同。学生被指示注意左手或右手，并计算靶子的数目。结果表明，N1对注意和传递率的实验操作不敏感。选择性注意对ERP各成分的影响以P2和N2波幅最为显著(P300除外)。主成分分析显示，在这一时间段内最活跃的成分是因子2，在外侧部位的注意相关效应模式与在P2和N2波幅中观察到的非常相似。在被注意的手中，目标的躯体感觉加工负性比标准的大，这似乎是一种注意力效应。这一成分的对侧优势可能反映了对与任务相关的刺激性质的特定加工-刺激的空间位置及其相对强度。(参考9)(心理信息数据库记录(C)2016 APA，保留所有权利)
Examined the nature and scalp distribution of selective attention effects on somatosensory event-related brain potentials (ERPs) and the effect of delivery rate on 8 Ss (mean age 21 yrs). Stimuli consisted of constant-current pulses (. 5-msec duration) delivered to the palmar surface of the middle and distal phalanges of the right and left index fingers. Either a weak (the standard) or strong (the target) shock was delivered to each finger. Interstimulus intervals were varied according to 300-msec periods. Ss were instructed to attend to either the left or right hand and to count the number of targets. Results indicate that N1 was insensitive to experimental manipulations of attention and delivery rate. The effects of selective attention on ERP components were most marked in the amplitude of P2 and N2 (except for P300). Principal components analysis revealed a component, Factor 2, that was maximally active over this time region with a pattern of attention-related effects at the lateral sites highly similar to that observed in P2 and N2 amplitudes. Somatosensory processing negativity was larger in targets than in standards on the attended hand, which appeared to be an attention effect. The contralateral dominance of this component may reflect modality-specific processing of those stimulus qualities relevant to the task—the spatial location of the stimulus and its relative intensity.(9 ref)(PsycINFO Database Record (c) 2016 APA, all rights reserved)