Modulation of oscillatory neuronal synchronization by selective visual attention

被引：1975
|
作者：
Fries, P
Reynolds, JH
Rorie, AE
Desimone, R
机构：
[1] NIMH, Neuropsychol Lab, NIH, Bethesda, MD 20892 USA
[2] Salk Inst Biol Studies, Syst Neurobiol Lab, La Jolla, CA 92037 USA
来源：
SCIENCE | 2001年 / 291卷 / 5508期
关键词：
D O I：
10.1126/science.1055465
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
In crowded visual scenes, attention is needed to select relevant stimuli. To study the underlying mechanisms, we recorded neurons in cortical area V4 while macaque monkeys attended to behaviorally relevant stimuli and ignored distracters. Neurons activated by the attended stimulus showed increased gamma-frequency (35 to 90 hertz) synchronization but reduced low-frequency (<17 hertz) synchronization compared with neurons at nearby V4 sites activated by distracters. Because postsynaptic integration times;are short, these Localized changes in synchronization may serve to amplify behaviorally relevant signals in the cortex.
引用
收藏
页码：1560 / 1563
页数：4
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