The time course of spatial orienting elicited by central and peripheral cues: evidence from event-related brain potentials
The time course of spatial orienting elicited by central and peripheral cues: evidence from event-related brain potentials
复制标题
DOI：
10.1016/s0301-0511(00)00049-1
复制
发表时间：
2000-07-01
影响因子：
2.6
通讯作者：
Eimer, M
中科院分区：
文献类型：
--
作者：
Eimer, M
研究显著性外围事件和中心性符号线索触发注意定向时程的差异，在200或700 ms的线索-靶间期（CTI）后，记录了对字母刺激的事件相关脑电位（ERP），这些字母刺激是在空间信息符号或周边前提下进行的。（出席）的位置引起了增强的消极相对于刺激在uncue位置。短颈动脉感染。这些效应在外围线索的刺激后大约150 ms开始。他们被延迟了大约100毫秒的中央线索。这种潜伏期差异被认为是反映快速外源性定向引起的外围，但不是由中央线索。超过200毫秒后的刺激，注意力负性更大的长CTIs比短CTIs的两种线索类型，可能与逐渐建立的内源性定向触发的空间预测事件。(C)2000 Elsevier Science B. V.保留所有权利。
To study differences in the time course of attentional orienting triggered by salient peripheral events and by central symbolic precues, event-related brain potentials (ERPs) were recorded in response to letter stimuli following spatially informative symbolic or peripheral precues after a cue-target interval (CTI) of either 200 or 700 ms. Stimuli at cued (attended) locations elicited an enhanced negativity relative to stimuli at uncued locations. With short CTIs. these effects started around 150 ms post-stimulus for peripheral cues. They were delayed by about 100 ms for central cues. This latency difference is assumed to reflect fast exogenous orienting elicited by peripheral, but not by central cues. Beyond 200 ms post-stimulus, attentional negativities were larger with long CTIs than with short CTIs for both cue types, presumably related to the gradual build-up of endogenous orienting triggered by spatially predictive events. (C) 2000 Elsevier Science B.V. All rights reserved.