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  • Title: Correlation dimension changes of the EEG during the wakefulness-sleep cycle.
    Author: Molnár M, Skinner JE.
    Journal: Acta Biochim Biophys Hung; ; 26(1-4):121-5. PubMed ID: 1844795.
    Abstract:
    The mathematical tools of chaos theory make the quantification of a time series such as the electroencephalogram possible by calculating its correlation dimensions. In this study, the electroencephalogram was recorded from the vertex in cats during the wakefulness-sleep cycle and its correlation dimension was determined. For the estimation of the correlation dimension a new method, the point-correlation dimension was used. This method is more accurate than others currently used for tracking non-stationarities within the data. The point-correlation dimension was higher during the alert state than in slow wave sleep. It is suggested that during the alert state a different type of pacemaker activity takes over in the generation of the electroencephalogram.
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