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Potential dementia biomarkers based on the time-varying microstructure of sleep...
Ortigueira, M.D.; Ktonas, P. Y.; Golemati, S.; Xanthopoulos, P.Proceedings of the 29th Annual International Conference of the IEEE EMBS Cité Internationale, Lyon, France August 23-26, 2007 ; The time-varying microstructure of sleep EEG spindles may have clinical significance in dementia studies. In this work, the sleep spindle is modeled as an AM-FM signal and parameterized in terms of six parameters, three quantifying the instantaneous envelope (IE) and three quantifying...
Comparative analysis of time-frequency methods estimating the time-varying micr...
Ortigueira, M.D.; Xanthopoulos, P.; Golemati, S.; Sakkalis, V.Proceedings of the Information Technology Applications in Biomedicine, Ioannina - Epirus, Greece, October 26-28, 2006 ; Parameter estimation for an assumed sleep EEG spindle model (AM-FM signal) is performed by using four time-frequency analysis methods. Results from simulated as well as from real data are presented. In simulated data, the Hilbert Transform-based method has the lowest average percentage error ...
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