Identification of ocular artifact in EEG signals using VMD and Hurst exponent.

Q3 Pharmacology, Toxicology and Pharmaceutics

Journal of Basic and Clinical Physiology and Pharmacology Pub Date : 2024-10-24 DOI:10.1515/jbcpp-2024-0027

Amandeep Bisht, Preeti Singh, Pardeep Kaur, Geeta Dalal

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引用次数: 0

Abstract

Objectives: Electroencephalographic (EEG) readings are usually infected with unavoidable artifacts, especially physiological ones. One such physiological artifact is the ocular artifacts (OAs) that are generally related to eyes and are characterized by high magnitude and a specific spike pattern in the prefrontal region of the brain. During the long-duration EEG acquisition, the retrieval of important information becomes quite complicated in prefrontal regions as ocular artifacts dominate the EEG recorded, making it difficult to discern underlying brain activity.

Methods: With the progress and development in signal processing techniques, artifact handling has become a progressive field of investigation. This paper presents a framework for the detection and correction of ocular artifacts. This study emphasizes improving the quality and reducing the time complexity by using higher-order statistics (HOS) for artifact identification and variational mode decomposition (VMD) for OA correction.

Results: An overall SNR of 14 dB, MAE of 0.09, and PSNR of 33.59 dB has been attained by the proposed framework.

Conclusions: It was observed that the proposed HOS-VMD surpassed the state-of-the-art mode decomposition techniques.

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利用 VMD 和 Hurst 指数识别脑电信号中的眼球伪影。

目的：脑电图（EEG）读数通常会受到不可避免的伪影影响，尤其是生理伪影。其中一种生理伪影是眼球伪影（OAs），通常与眼睛有关，其特征是大脑前额叶区域的高幅度和特定尖峰模式。在长时间的脑电图采集过程中，前额叶区域的重要信息检索变得相当复杂，因为眼部伪影在脑电图记录中占主导地位，从而难以辨别潜在的大脑活动：随着信号处理技术的进步和发展，伪影处理已成为一个渐进的研究领域。本文提出了一个检测和校正眼部伪影的框架。本研究强调通过使用高阶统计（HOS）进行伪影识别和变异模式分解（VMD）进行 OA 校正来提高质量和降低时间复杂性：结果：拟议框架的总体信噪比为 14 dB，MAE 为 0.09，PSNR 为 33.59 dB：结论：据观察，拟议的 HOS-VMD 超越了最先进的模式分解技术。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Basic and Clinical Physiology and Pharmacology Pharmacology, Toxicology and Pharmaceutics-Pharmacology

CiteScore

3.90

自引率

0.00%

发文量

期刊介绍： The Journal of Basic and Clinical Physiology and Pharmacology (JBCPP) is a peer-reviewed bi-monthly published journal in experimental medicine. JBCPP publishes novel research in the physiological and pharmacological sciences, including brain research; cardiovascular-pulmonary interactions; exercise; thermal control; haematology; immune response; inflammation; metabolism; oxidative stress; and phytotherapy. As the borders between physiology, pharmacology and biochemistry become increasingly blurred, we also welcome papers using cutting-edge techniques in cellular and/or molecular biology to link descriptive or behavioral studies with cellular and molecular mechanisms underlying the integrative processes. Topics: Behavior and Neuroprotection, Reproduction, Genotoxicity and Cytotoxicity, Vascular Conditions, Cardiovascular Function, Cardiovascular-Pulmonary Interactions, Oxidative Stress, Metabolism, Immune Response, Hematological Profile, Inflammation, Infection, Phytotherapy.