Dynamics of EEG background activity level during quiet sleep in multiple nocturnal sleep episodes in infants

Electroencephalography and Clinical Neurophysiology
Igino Fagioli, Piero Salzarulo

Abstract

The study reported in this paper investigated the dynamics of EEG background activity during quiet sleep (QS) in the first year of life. These dynamics have been previously shown to follow an intra-sleep trend within a single sleep episode, and the aim of this study was to show whether they were similar in two successive nocturnal sleep episodes interrupted by a waking episode, or whether they exhibited a progressive trend across the two episodes. The polygraphic recordings of two groups of 6 infants aged from 9 to 15 weeks old and from 25 to 47 weeks old, whose nocturnal sleep organisation was spontaneously interrupted, were selected. Three indicators of the time course of the parameter value, obtained from automatic analysis and reflecting the degree of synchronisation of the EEG activity recorded by the centro-occipital lead, were computed for the first two QS periods of two successive sleep episodes: the parameter range (difference between the EEG parameter value at the QS onset and that at the trough); the trough latency (time interval between QS onset and trough); and rate of synchronisation (range/trough latency). All 3 indicators differed between the first and the second QS period of both sleep episodes independently of...Continue Reading

References

Jan 1, 1990·Journal of Biological Rhythms·P Achermann, A A Borbély
Oct 1, 1986·Electroencephalography and Clinical Neurophysiology·W HausteinH Schulz
Dec 1, 1988·Early Human Development·I FagioliP Salzarulo
Oct 1, 1974·Journal of Psychiatric Research·I Feinberg
May 1, 1981·Electroencephalography and Clinical Neurophysiology·A A BorbélyD Lehmann
Apr 1, 1982·Early Human Development·I Fagioli, P Salzarulo
Jan 1, 1995·Electroencephalography and Clinical Neurophysiology·I FagioliP Salzarulo

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Citations

Jan 18, 2003·Sleep Medicine Reviews·Torbjorn AkerstedtHartmut Schulz

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