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Subjective sleep quality and spectral analysis of electroencephalogram during nocturnal sleep

J.M. Vergara-Ugarriza, J. Brualla, M. Serrano, J. Arcocha, F.J. López-Lorente DOI: https://doi.org/10.33588/rn.2808.98328

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Volumen 28 | Number 08 | Nº of views of the article 8.874 | Nº of PDF downloads 405 | Article publication date 16/04/1999

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ABSTRACT

INTRODUCTION The relation between subjective sleep quality and the stages of polysomnography is unclear. Computerized sleep analysis provides a reliable tool for the study of sleep dynamics. OBJECTIVE. To study the relation between subjective sleep quality and spectral EEG parameters during nocturnal sleep. Material and methods. Nocturnal sleep were recorded ambulatory in 26 subjects aged from 8 to 63. The following variables were extracted from EEG signal (Fz-Pz) quantified through the Fast Fourier Transformation (FFT): delta maximum, spectral peak, delta sleep time, efficiency and desynchronized sleep. A sleep diary was administered in the morning to assess the subjective sleep quality. Multiple regression and Anova were used for statistical analysis.

RESULTS Efficiency and delta maximum became significant predictors accounting for 54% of subjective sleep variance. The item ‘how was your sleep?’ was answered in a different way according to the delta maximum.

CONCLUSIONS Sleep depth, measured by spectral analysis, is an important predictor of the subjective sleep quality. The sleep classification in discrete stages ignores this feature KeywordsDelta sleep Electroencephalogram quantified Spectral analysis Subjective sleep quality CategoriesNeuropsiquiatría Sueño Técnicas exploratorias

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Original

Subjective sleep quality and spectral analysis of electroencephalogram during nocturnal sleep