Exploring resting-state EEG complexity before migraine attacks

Author:

Cao Zehong12ORCID,Lai Kuan-Lin345,Lin Chin-Teng12,Chuang Chun-Hsiang12,Chou Chien-Chen34,Wang Shuu-Jiun34

Affiliation:

1. Center for Artificial Intelligence, Faculty of Engineering and Information Technology, University of Technology Sydney, Sydney, Australia

2. Brain Research Center, National Chiao Tung University, Hsinchu, Taiwan

3. Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan

4. Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan

5. Institute of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan

Abstract

Objective Entropy-based approaches to understanding the temporal dynamics of complexity have revealed novel insights into various brain activities. Herein, electroencephalogram complexity before migraine attacks was examined using an inherent fuzzy entropy approach, allowing the development of an electroencephalogram-based classification model to recognize the difference between interictal and preictal phases. Methods Forty patients with migraine without aura and 40 age-matched normal control subjects were recruited, and the resting-state electroencephalogram signals of their prefrontal and occipital areas were prospectively collected. The migraine phases were defined based on the headache diary, and the preictal phase was defined as within 72 hours before a migraine attack. Results The electroencephalogram complexity of patients in the preictal phase, which resembled that of normal control subjects, was significantly higher than that of patients in the interictal phase in the prefrontal area (FDR-adjusted p < 0.05) but not in the occipital area. The measurement of test-retest reliability (n = 8) using the intra-class correlation coefficient was good with r1 = 0.73 ( p = 0.01). Furthermore, the classification model, support vector machine, showed the highest accuracy (76 ± 4%) for classifying interictal and preictal phases using the prefrontal electroencephalogram complexity. Conclusion Entropy-based analytical methods identified enhancement or “normalization” of frontal electroencephalogram complexity during the preictal phase compared with the interictal phase. This classification model, using this complexity feature, may have the potential to provide a preictal alert to migraine without aura patients.

Publisher

SAGE Publications

Subject

Neurology (clinical),General Medicine

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