Use of stochastic grammars for hypnogram analysis

The hypnogram is a schematic representation of sleep dynamics as a sequence of stages along the night. In a sense, it is a model of the so called sleep macrostructure. This paper considers the hypnogram as expression of a language whose structure is to be analysed and modeled in terms of stochastic...

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Bibliographic Details
Main Authors: Fred, A.L.N., Leitao, J.M.N.
Format: Conference Proceeding
Language:English
Subjects:
Context modeling
Drugs
Electroencephalography
Inspection
Microstructure
Morphology
Pathology
Production
Psychology
Stochastic processes
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Summary:The hypnogram is a schematic representation of sleep dynamics as a sequence of stages along the night. In a sense, it is a model of the so called sleep macrostructure. This paper considers the hypnogram as expression of a language whose structure is to be analysed and modeled in terms of stochastic grammars. These are inferred using Crespi-Reghizzi's method. A parsing algorithm, exploring the particular structure of the inferred grammars, has been developed. Classification strategies for both noisy and non-noisy patterns is also discussed. An example concerning a population of normals and a population of psychiatric (dysthymic) patients is presented.< >
DOI:10.1109/ICPR.1992.201764