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首页> 外文期刊>International journal of psychophysiology: official journal of the International Organization of Psychophysiology >Comparison of the distributions of classical and adaptively aligned EEG power spectra.
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Comparison of the distributions of classical and adaptively aligned EEG power spectra.

机译：比较经典和自适应对齐的脑电图功率谱的分布。

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摘要

The distributions of eyes-closed resting electroencephalography (EEG) power spectra and their residuals were described and compared using classically averaged and adaptively aligned averaged spectra. Four minutes of eyes-closed resting EEG was available from 69 participants. Spectra were calculated with 0.5-Hz resolution and were analyzed at this level. It was shown that power in the individual 0.5 Hz frequency bins can be considered normally distributed when as few as three or four 2-second epochs of EEG are used in the average. A similar result holds for the residuals. Power at the peak Alpha frequency has quite different statistical behaviour to power at other frequencies and it is considered that power at peak Alpha represents a relatively individuated process that is best measured through aligned averaging. Previous analyses of contrasts in upper and lower alpha bands may be explained in terms of the variability or distribution of the peak Alpha frequency itself.
机译：闭眼静息脑电图（EEG）功率谱的分布及其残差被描述并使用经典平均和自适应对齐的平均谱进行比较。 69名参与者可获得四分钟的闭眼静息EEG。以0.5 Hz的分辨率计算频谱，并在此水平上进行分析。结果表明，当平均使用少于三个或四个2秒的EEG时，可以将各个0.5 Hz频率仓中的功率视为正态分布。残差也类似。峰值Alpha频率处的功率与其他频率处的功率具有完全不同的统计行为，并且可以认为，峰值Alpha处的功率代表相对个体化的过程，最好通过对齐平均来测量。可以根据峰值Alpha频率本身的可变性或分布来解释先前在较高和较低的alpha波段中的对比度分析。

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