New vistas for α-frequency band oscillations

被引：1013
作者：
Palva, Satu
Palva, J. Matias
机构：
[1] Univ Helsinki, Neurosci Ctr, FI-00014 Helsinki, Finland
[2] Univ Helsinki, Cent Hosp, BioMag Lab, FI-00029 Helsinki, Finland
[3] Univ Helsinki, Dept Psychol, Cognit Brain Res Unit, FI-00014 Helsinki, Finland
[4] Univ Helsinki, Dept Biol & Environm Sci, FI-00014 Helsinki, Finland
来源：
TRENDS IN NEUROSCIENCES | 2007年 / 30卷 / 04期
基金：
芬兰科学院;
关键词：
D O I：
10.1016/j.tins.2007.02.001
中图分类号：
Q189 [神经科学];
学科分类号：
071006 ;
摘要：
The amplitude of alpha-frequency band (8-14 Hz) activity in the human electroencephalogram is suppressed by eye opening, visual stimuli and visual scanning, whereas it is enhanced during internal tasks, such as mental calculation and working memory. alpha-Frequency band oscillations have hence been thought to reflect idling or inhibition of task-irrelevant cortical areas. However, recent data on alpha-amplitude and, in particular, alpha-phase dynamics posit a direct and active role for alpha-frequency band rhythmicity in the mechanisms of attention and consciousness. We propose that simultaneous alpha-, beta- (1430 Hz) and gamma- (30-70 Hz) frequency band oscillations are required for unified cognitive operations, and hypothesize that cross-frequency phase synchrony between alpha, beta and gamma oscillations coordinates the selection and maintenance of neuronal object representations during working memory, perception and consciousness.
引用
收藏
页码：150 / 158
页数：9
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