Sigma (12-15 Hz) and delta (0.3-3 Hz) EEG oscillate reciprocally within NREM sleep.

Abstract:

:Sleep EEG in the sigma and delta frequency bands was subjected to spectral analysis in 8 normal young adults. In each subject, power density of sigma and delta oscillated reciprocally during NREM sleep, confirming an observation made initially with period/amplitude analysis. In REM sleep, power density for both frequency bands was at its lowest levels. Correlation coefficients between power density of delta vs. 1/sigma for all artifact-free 20-s epochs of NREM sleep/night were highly significant for each subject. These results show that cyclic oscillation of EEG within sleep is not limited to delta frequencies. The reciprocal relation of sigma to delta holds implications for the EEG mechanisms of NREM sleep. This dynamic pattern may also prove useful for sleep stage scoring and for a finer empirical analysis of sleep in psychiatric and neurological disorders.

journal_name

Brain Res Bull

journal_title

Brain research bulletin

authors

Uchida S,Maloney T,March JD,Azari R,Feinberg I

doi

10.1016/0361-9230(91)90286-s

subject

Has Abstract

pub_date

1991-07-01 00:00:00

pages

93-6

issue

1

eissn

0361-9230

issn

1873-2747

pii

0361-9230(91)90286-S

journal_volume

27

pub_type

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