脑电信号预处理方法研究综述

doi:10.16180/j.cnki.issn1007-7820.2023.04.005

Abstract

Abstract:

EEG signal is a complex and important biological signal, which is widely used in the research of brain-like intelligence technology and brain-computer interface. In this study, the types and characteristics of common non-physiological artifacts and physiological artifacts that interfere with normal EEG signals are introduced, and the causes of physiological artifacts are analyzed in detail. Through the review of various EEG artifact removal methods and the analysis of the application status, the research progress of traditional artifact removal methods and new artifact removal methods is compared and summarized, and the advantages and disadvantages of artifact removal methods are further analyzed. Some methods have been successfully applied to the processing of electrocardiogram, ECG and EMG artifacts in EEG signals.The current demand for artifact removal from EEG signals and the problems faced are also given in the present study, and the future research directions are analyzed and prospected.

Key words: EEG signal, preprocessing, artifacts removal, BSS, wavelet transform, EMD, artificial neural network, deep learning

CLC Number:

TP391

LUO Ruipeng,FENG Mingke,HUANG Xin,ZOU Renling,LI Dan. A Review of Research on EEG Signal Preprocessing Methods[J].Electronic Science and Technology, 2023, 36(4): 36-43.

Figures/Tables 5

Table 1.

Figure 1.

Figure 2.

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Table 2.

References 50

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伪迹类型	产生原因及特点
眼动或眨眼	主要由眼动/眨眼所产生,振幅较大,在大脑头皮前部比较明显。
肌肉活动	由头部、肢体、下巴或者舌头等运动产生干扰的信号,其频率通常大于30 Hz,与脑电快波活动相比较,肌肉活动频率更快,波幅更高。
心电	由心脏跳动产生的干扰信号,影响较小。心电伪迹的间隙大多是相等的,但在心律不齐的患者中,这种间隙是不等的。
血管波	在头皮动脉附近的电极产生。如果能同时记录到心电伪迹,则心电伪迹以不变的周期位于血管波伪迹之前。
出汗	有缓慢的漂移,持续时间达数秒为出汗所致的伪迹。这种伪迹在额部最常见,并可影响到临近的几个电极导联。
舌咽部运动	如讲话、咀嚼、吮吸、吞咽、咳嗽、打呃能引起舌运动的伪迹。

当前伪迹去除技术	存在的问题与缺陷
低通、高通、带通等数字滤波方法	伪迹信号通常与脑电信号频谱重叠,只能滤除不在同一频带的噪声。
线性回归、自适应滤波、贝叶斯滤波方法	需要额外的参考通道且采集脑电实验前需进行适当的校准。
独立成分分析(ICA)等盲源分离方法	需人为观察并判别伪迹成分以去除,十分耗时耗力且结果不一定准确;算法效果比较依赖数据量的大小。
小波包分解等基于小波变换方法	分离效果依赖于小波基函数的选择及其与源信号的相似性。
经验模态分解及其不同变体形式	分解过程存在模态混叠等现象;末端效应会影响分解效果;对噪声的鲁棒性较差;目前局限于单通道脑电信号的使用上。
随机森林、聚类等机器学习方法与改进的深度学习方法	在多个伪迹成分同时存在的情况下,算法模型的稳定性和可靠性有待提高;依赖大量脑电数据训练模型。

A Review of Research on EEG Signal Preprocessing Methods

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