视觉注意范围的调控机制

发布时间：2018-03-06 22:12

本文选题：视觉空间注意　切入点：范围等级　出处：《航天医学与医学工程》2002年03期 　论文类型：期刊论文

【摘要】：目的使用固定位置的位置性注意范围提示 ,研究注意范围的脑内时程的动态变化。方法被试者为 12名健康右利手青年人 ,视觉刺激序列为 :背景 -提示 -靶刺激。提示物为一个圆 ,有 3种大小 ,其圆心均在屏幕中点。要求被试在提示范围内寻找靶刺激并判断其朝向。同时记录反应时和 12 8导脑电(EEG)数据。结果随着注意范围的扩大 ,对同等位置靶刺激的反应时缩短 ;靶刺激诱发ERP的P1、N1不受提示范围大小的影响 ,而其后部P2波幅与注意范围显著相关 ,前部N2的波幅随注意范围的扩大而增大。结论 1)视觉注意诱发的P1、N1成分 ,主要与空间方位信息的加工相关 ;2 )提示物诱发的P2、N2成分与注意范围相关 ,其机制与注意方位的增益机制类似 ;3 )在视觉信息加工过程中 ,注意方位信息要早于注意范围信息被加工 ,支持这两者间串行加工的观点
[Abstract]:Objective to study the dynamic changes of the brain time course of attention range using locational attention range cues in a fixed position. Methods the subjects were 12 healthy right-handedness young people. The visual stimulus sequence is: background-hint-target stimuli. The cues are a circle, and there are three sizes. The center of the circle was at the midpoint of the screen. Subjects were asked to look for the target stimulus and judge its orientation within the range of cues. The response time and 128 conduction EEG data were recorded simultaneously. The response time to target stimulation in the same position was shortened, and the P _ 1N _ 1 of ERP induced by target stimulation was not affected by the size of the range of cues, but the amplitude of P2 wave in the posterior part was significantly correlated with the range of attention. Conclusions 1) the P1N 1 component induced by visual attention is mainly related to the processing of spatial azimuth information (2) the P2N 2 component induced by the object is related to the attention range. Its mechanism is similar to the gain mechanism of attention azimuth. (3) in the process of visual information processing, the attention orientation information is processed earlier than the attention range information, which supports the viewpoint of serial processing between the two.
【作者单位】：中国科学院心理研究所中国科学院心理研究所中国科学院心理研究所中国科学院心理研究所
【基金】：中国科学院“百人计划” 中国科学院重大交叉学科前沿项目 (KJCX1 0 7) 国家自然科学基金资助项目 ( 39970 2 5 7)
【分类号】：R853

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