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Title: Diferencias en la dimensionalidad electroencefalograma entre vigilia y sueño profundo
Author: Rifà Ros, Esteve Xavier
Fuentemilla Garriga, Lluís
Viader Junyent, Manel
Grau Fonollosa, Carles
Keywords: Teoria de sistemes
System theory
Issue Date: 2008
Publisher: Facultad de Psicología de la Universidad de Oviedo y el Colegio Oficial de Psicólogos del Principado de Asturias
Abstract: Differences in dimensionality of electroencephalogram during awake and deeper sleep stages. The nonlinear dynamical systems theory provides some tools for the analysis of electroencephalogram (EEG) at different sleep stages. Its use could allow the automatic monitoring of the states of the sleep and it would also contribute an explanatory level of the differences between stages. The goal of the present paper is to address this type of analysis, focusing on the most different stages. Estimations of dimensionality were compared when six subjects were awake and in a deep sleep stage. Greater dimensionality involves more complexity because the system receives more external influences. If this dimensionality is maximum, we can consider that the time series is a noisy one. A smaller dimensionality involves lower complexity because the system receives fewer inputs. We hypothesized that we would find greater dimensionality when subjects were awake than in a deep sleep stage. Results show a noisy time series during the awake stage, whereas in the sleep stage, dimensionality is smaller, confirming our hypothesis. This result is similar to the findings reached previously by other authors.
Note: Reproducció del document publicat a:
It is part of: Psicothema, 2008, vol. 20, num. 4, p. 964-968
ISSN: 0214-9915
Appears in Collections:Articles publicats en revistes (Cognició, Desenvolupament i Psicologia de l'Educació)

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