Indexing the graded allocation of visuospatial attention using anticipatory alpha oscillations.
Indexing the graded allocation of visuospatial attention using anticipatory alpha oscillations.
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DOI：
10.1152/jn.00653.2010
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发表时间：
2011-03
影响因子：
2.5
通讯作者：
Nobre AC
中科院分区：
文献类型：
--
作者：
Gould IC;Rushworth MF;Nobre AC
侧化在预期枕顶α（8-12 Hz）振荡的去兴奋化已经牵连在选择性视觉空间注意的分配。先前的研究表明，α-波段活动侧化的微小变化可以预测行为表现，但尚未直接研究α-波段活动侧化与自上而下的注意力目标之间的灵活性。为了解决这个问题，我们向参与者提供了关于目标出现位置的不同程度的空间确定性的线索。EEG数据的时间-频率分析表明，操纵空间的确定性导致分级的变化在何种程度上的α振荡偏侧的枕顶皮层在线索-目标间隔。我们发现，注意力对侧α去极化的个体差异预测了反应时间、目标感知处理的事件相关电位测量以及通常与反应准备相关的β波段（15-25 Hz）活动。这些结果支持了这一假设，即预期α调制是一个合理的视觉空间注意分配的神经机制，是灵活的自上而下的控制。
Lateralization in the desynchronization of anticipatory occipitoparietal alpha (8–12 Hz) oscillations has been implicated in the allocation of selective visuospatial attention. Previous studies have demonstrated that small changes in the lateralization of alpha-band activity are predictive of behavioral performance but have not directly investigated how flexibly alpha lateralization is linked to top-down attentional goals. To address this question, we presented participants with cues providing varying degrees of spatial certainty about the location at which a target would appear. Time-frequency analysis of EEG data demonstrated that manipulating spatial certainty led to graded changes in the extent to which alpha oscillations were lateralized over the occipitoparietal cortex during the cue-target interval. We found that individual differences in alpha desynchronization contralateral to attention predicted reaction times, event-related potential measures of perceptual processing of targets, and beta-band (15–25 Hz) activity typically associated with response preparation. These results support the hypothesis that anticipatory alpha modulation is a plausible neural mechanism underlying the allocation of visuospatial attention and is under flexible top-down control.
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影响因子：
4.7
作者：
Doyle, LMF;Yarrow, K;Brown, P
通讯作者：
Brown, P
影响因子：
2.5
作者：
Boudreau, C. Elizabeth;Williford, Tori H.;Maunsell, John H. R.
通讯作者：
Maunsell, John H. R.
DOI：
10.1080/14640749208401284
发表时间：
1992-01-01
期刊：
QUARTERLY JOURNAL OF EXPERIMENTAL PSYCHOLOGY SECTION A-HUMAN EXPERIMENTAL PSYCHOLOGY
影响因子：
--
作者：
KINGSTONE, A
通讯作者：
KINGSTONE, A
影响因子：
1.8
作者：
Eckstein, Miguel P.;Shimozaki, Steven S.;Abbey, Craig K.
通讯作者：
Abbey, Craig K.
影响因子：
25
作者：
Chawla, D;Rees, G;Friston, KJ
通讯作者：
Friston, KJ