Analysis of EEG Signals Contaminated With Motion Artifacts Using Multiscale Modified-Distribution Entropy

Si Thu Aung,Yodchanan Wongsawat

doi:10.1109/access.2021.3061692

Abstract

The detection of motion artifacts in electroencephalogram (EEG) analysis is a high priority, especially for wearable, portable, or wireless EEG monitoring systems. Recently, many scholars have proposed numerous promising techniques to address this issue, e.g., blind source separation (BSS) and independent component analysis (ICA). However, real-time detection with low processing time and friendly use for embedded systems in wearable devices still needs more investigation. Therefore, in this paper, we considered an alternative method for approaching the motion artifact detection problem in EEG signals and proposed a new method called multiscale modified-distribution entropy (M-mDistEn). An efficient coarse-grained procedure was added into the modified-distribution entropy (mDistEn) to consider the various scales (frequencies) of the signals. The results showed that this method is suitable for distinguishing between noisy and normal portions of the signal with a maximum accuracy of approximately 93%. In addition, the M-mDistEn method led to $p$ -values of less than 0.05, indicating statistically significant results of differentiating the motion artifact EEG signals from the clean EEG signals. By comparing the different multiscale entropies, our proposed multiscale entropy was more accurate and robust. Thus, the proposed M-mDistEn method is an effective and efficient entropy method for the analysis of EEG signals corrupted by motion artifacts.

Highlights

Electroencephalograms (EEGs) are useful for measuring physiological changes and monitoring the activities of the human brain, and EEG recording is one of the most common techniques used in various applications related to the brain [1]
Since [14] verified that both DistEn and fuzzy entropy (FuzzyEn) yielded promising results in different types of epileptic seizure data, in our previous work [24], we proposed the combination of both entropies to explore the advantages of both of them called modified-distribution entropy
OF DIFFERENT ENTROPIES ON SIMULATION SIGNALS According to the above subsection, the parameter estimation of M-modified-distribution entropy (mDistEn) was used for the analysis of EEG signals contaminated with motion artifacts

Summary

Introduction

Electroencephalograms (EEGs) are useful for measuring physiological changes and monitoring the activities of the human brain, and EEG recording is one of the most common techniques used in various applications related to the brain [1]. Requiring no movement during whole-day recordings of EEG signals may be uncomfortable or impossible for patients [4]. This motion artifact is unavoidable with wearable, portable, or wireless EEG devices. Detecting these motion artifacts is an important fundamental process before making the automatic decision to neglect or remove them prior to the analysis or processing. Promising performance has been achieved with the mentioned techniques, real-time detection with low processing time and friendly use for embedded systems in wearable devices still needs more investigation

Methods

Results

Conclusion