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Browsing by Author "Zhu, Qiang"

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    MICROSTATE ANALYSIS OF ALPHA-EVENT BRAIN TOPOGRAPHY DURING CHAN MEDITATION
    (2009)
    Lo, Pei-Chen
    ;
    Zhu, Qiang
    ;
    電控工程研究所
    ;
    Institute of Electrical and Control Engineering
    This paper reports our preliminary result of microstate analysis for the spatiotemporal characteristics of Chan-meditation brain wave (electroencephalograph, EEG) based on time-varying dipolar-vector model of the alpha-map. Microstate behavior reveals subtle transience of focalized event. Multi-channel alpha-event epochs were identified by Wavelet decomposition and feature extraction. Global field power was adopted as the criterion to choose alpha-map candidates (normalized alpha-power vectors), that were further classified by Mahalanobis Fuzzy C-means into different region-focalization states. Transition between various alpha-event focalization states was ready to be explored via microstate analysis. Our findings reveal that Chan-meditation practitioners exhibit longer duration of frontal alpha-event microstate, reflecting sustained stability of the brain generators.