Scaling properties of fluctuations in the human electroencephalogram
Scaling properties of fluctuations in the human electroencephalogram
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DOI：
10.1103/physreve.66.021901
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发表时间：
2002-08-01
影响因子：
2.4
通讯作者：
Ferree, TC
中科院分区：
文献类型：
--
作者：
Hwa, RC;Ferree, TC
利用去趋势波动分析方法研究了人脑电时间序列的波动特性。对于几乎所有的128个通道中的每一个研究的28个科目，它被发现的标准偏差的波动表现出两个区域的标度行为。标度指数的拓扑图揭示了头皮上记录的非线性电活动的空间结构。进行矩分析以总结跨通道的全局变异性。在每个通道中的两个标度指数之间的相关性也被检查。两个全球性的措施，简洁地描述了每个主题的大脑动力学的波动行为的整体属性。他们共同区分中风受试者与正常人的准确率为90%，这表明这种分析可能会导致一种有效的诊断工具。
The fluctuation properties of the human electroencephalogram time series are studied using detrended fluctuation analysis. For nearly all 128 channels in each of the 28 subjects studied, it is found that the standard deviation of the fluctuations exhibits scaling behaviors in two regions. Topographical plots of the scaling exponents reveal the spatial structure of the nonlinear electrical activities recorded on the scalp. Moment analyses are performed to summarize the global variability across channels. The correlation between the two scaling exponents in each channel is also examined. Two global measures are found that succinctly characterize the overall properties of the fluctuation behaviors of the brain dynamics for each subject. Together they distinguish the stroke subjects from the normal ones with 90% accuracy, suggesting the possibility that this analysis could lead to an effective diagnostic tool.