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arXiv 1608.03464q-bio.NC
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一种用于实时脑-机接口的脑电噪声谱统计模型

A New Statistical Model of Electroencephalogram Noise Spectra for Real-time Brain-Computer Interfaces

Alan Paris, George Atia, Azadeh Vosoughi, Stephen Berman

摘要:

$Objective$:神经信号处理的一个特征是从亚细胞离子通道到全脑过程的高水平噪声。在本文中,我们提出了一个新的模型的脑电图(EEG)的背景周期图,基于一个家庭的功能,我们称之为广义范德Ziel-McWhorter(GVZM)功率谱密度(PSD)。据我们所知,GVZM PSD函数是唯一的EEG噪声模型,其具有相对较少的参数,以从0 Hz到超过30 Hz的高精度匹配记录的EEG PSD,并且在中频中具有近似$1/f^θ$行为而没有无穷大。$Methods$:我们使用三种方法来验证这个模型。首先,我们展示了GVZM PSD如何在最大熵平衡的离子通道中出现。其次,我们提出了一类混合自回归模型,它模拟大脑背景噪声,其周期图是渐近的GVZM PSD。第三,我们提出了两种稳态视觉诱发电位(SSVEP)频率的实时估计算法,并对它们的性能进行了统计分析。$Results$:在成对比较中,基于GVZM的算法显示出统计学上显着的精度提高了两个众所周知的和广泛使用的SSVEP估计。$Conclusion$:GVZM噪声模型是一种有用且可靠的EEG信号处理技术。$Significance$:了解EEG噪声对于基于EEG的神经病学和应用(如实时脑机接口(BCI))至关重要,这些应用必须从非常短的数据时期做出准确的控制决策。GVZM方法代表了理解和管理这种神经噪声的成功新范式。

英文摘要:

$Objective$: A characteristic of neurological signal processing is high levels of noise from sub-cellular ion channels up to whole-brain processes. In this paper, we propose a new model of electroencephalogram (EEG) background periodograms, based on a family of functions which we call generalized van der Ziel--McWhorter (GVZM) power spectral densities (PSDs). To the best of our knowledge, the GVZM PSD function is the only EEG noise model which has relatively few parameters, matches recorded EEG PSD's with high accuracy from 0 Hz to over 30 Hz, and has approximately $1/f^θ$ behavior in the mid-frequencies without infinities. $Methods$: We validate this model using three approaches. First, we show how GVZM PSDs can arise in population of ion channels in maximum entropy equilibrium. Second, we present a class of mixed autoregressive models, which simulate brain background noise and whose periodograms are asymptotic to the GVZM PSD. Third, we present two real-time estimation algorithms for steady-state visual evoked potential (SSVEP) frequencies, and analyze their performance statistically. $Results$: In pairwise comparisons, the GVZM-based algorithms showed statistically significant accuracy improvement over two well-known and widely-used SSVEP estimators. $Conclusion$: The GVZM noise model can be a useful and reliable technique for EEG signal processing. $Significance$: Understanding EEG noise is essential for EEG-based neurology and applications such as real-time brain-computer interfaces (BCIs), which must make accurate control decisions from very short data epochs. The GVZM approach represents a successful new paradigm for understanding and managing this neurological noise.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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