Multivariate multi-scale weighted permutation entropy analysis of EEG complexity for Alzheimer’s disease

Cognitive Neurodynamics - Tập 11 - Trang 217-231 - 2016
Bin Deng1, Lihui Cai1, Shunan Li1, Ruofan Wang2, Haitao Yu1, Yingyuan Chen3, Jiang Wang1
1School of Electrical Engineering and Automation, Tianjin University, Tianjin, China
2School of Information Technology Engineering, Tianjin University of Technology and Education, Tianjin, China
3School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, China

Tóm tắt

The complexity change of brain activity in Alzheimer’s disease (AD) is an interesting topic for clinical purpose. To investigate the dynamical complexity of brain activity in AD, a multivariate multi-scale weighted permutation entropy (MMSWPE) method is proposed to measure the complexity of electroencephalograph (EEG) obtained in AD patients. MMSWPE combines the weighted permutation entropy and the multivariate multi-scale method. It is able to quantify not only the characteristics of different brain regions and multiple time scales but also the amplitude information contained in the multichannel EEG signals simultaneously. The effectiveness of the proposed method is verified by both the simulated chaotic signals and EEG recordings of AD patients. The simulation results from the Lorenz system indicate that MMSWPE has the ability to distinguish the multivariate signals with different complexity. In addition, the EEG analysis results show that in contrast with the normal group, the significantly decreased complexity of AD patients is distributed in the temporal and occipitoparietal regions for the theta and the alpha bands, and also distributed from the right frontal to the left occipitoparietal region for the theta, the alpha and the beta bands at each time scale, which may be attributed to the brain dysfunction. Therefore, it suggests that the MMSWPE method may be a promising method to reveal dynamic changes in AD.

Tài liệu tham khảo

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