ELECTROPHYSIOLOGICAL CORRELATES OF FEATURE ANALYSIS DURING VISUAL-SEARCH
ELECTROPHYSIOLOGICAL CORRELATES OF FEATURE ANALYSIS DURING VISUAL-SEARCH
复制标题
DOI：
10.1111/j.1469-8986.1994.tb02218.x
复制
发表时间：
1994-05-01
期刊：
影响因子：
3.7
通讯作者：
HILLYARD, SA
中科院分区：
文献类型：
--
作者：
LUCK, SJ;HILLYARD, SA
事件相关脑电位（ERPs）记录从正常的年轻人在视觉搜索任务中，刺激阵列包含8个相同的项目（同质阵列）或7个相同的项目和一个偏离项目（弹出阵列）。进行了四个实验，其中不同类别的刺激阵列被指定为目标，其余的刺激阵列被指定为非目标。在实验1和2中，目标和非目标弹出刺激引起了增强的前N2波和对侧较大的后P1波，但实验3和4表明，这些组件不反映完全自动弹出检测过程。在所有四个实验中，目标弹出引起扩大前P2，后N2，枕P3和顶叶P3波。目标引起的后N2波包含对侧子成分（N2pc），其在电流源密度图中显示枕叶皮质上的焦点。结果的整体模式是一致的引导搜索模型，其中前注意刺激信息被用来引导注意任务相关的刺激。
Event-related brain potentials (ERPs) were recorded from normal young adults during visual search tasks in which the stimulus arrays contained either eight identical items (homogeneous arrays) or seven identical items and one deviant item (pop-out arrays). Four experiments were conducted in which different classes of stimulus arrays were designated targets and the remaining stimulus arrays were designated nontargets. In Experiments 1 and 2, both target and nontarget pop-out stimuli elicited an enhanced anterior N2 wave and a contralaterally larger posterior P1 wave, but Experiments 3 and 4 demonstrated that these components do not reflect fully automatic pop-out detection processes. In all four experiments, target pop-outs elicited enlarged anterior P2, posterior N2, occipital P3, and parietal P3 waves. The target-elicited posterior N2 wave contained a contralateral subcomponent (N2pc) that exhibited a focus over occipital cortex in maps of current source density. The overall pattern of results was consistent with guided search models in which preattentive stimulus information is used to guide attention to task-relevant stimuli.