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Brief communication: Human scalp recorded sigma activity is modulated by slow EEG oscillations during deep sleep

Fell J., , Elfadil H., , Röschke J., , Burr W., , Klaver P., , Elger C.E., and Fernández G., (2002) Brief communication: Human scalp recorded sigma activity is modulated by slow EEG oscillations during deep sleep International Journal of Neuroscience, 112 (7). pp. 893-900.

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Abstract

The EEG during deep sleep exhibits a distinct cortically generated slow oscillation of around and below 1 Hz which can be distinguished from other delta (0.5-3.5 Hz) activity. Intracranial studies showed that this slow oscillation triggers and groups cortical network firing. In the present study, we examined whether the phases of the slow oscillation during sleep stage 4 are correlated with the magnitude of sigma (12-16 Hz) and gamma (>20 Hz) scalp activity. For this purpose, 10-min segments of uninterrupted stage 4 sleep EEG from 9 subjects were analyzed by applying wavelet techniques. We found that scalp recorded sigma, but not gamma, activity is modulated by the phases of the slow oscillation during deep sleep. Enhancement of sigma activity was observed to be triggered by the peak of the surface positive slow wave component, whereas reduction of sigma activity started around the peak of the negative component.

Item Type: Article
Authors :
NameEmailORCID
Fell J., UNSPECIFIEDUNSPECIFIED
Elfadil H., UNSPECIFIEDUNSPECIFIED
Röschke J., UNSPECIFIEDUNSPECIFIED
Burr W., UNSPECIFIEDUNSPECIFIED
Klaver P., UNSPECIFIEDUNSPECIFIED
Elger C.E., UNSPECIFIEDUNSPECIFIED
Fernández G., UNSPECIFIEDUNSPECIFIED
Date : 2002
Identification Number : https://doi.org/10.1080/00207450290025905
Uncontrolled Keywords : Deep sleep, Gamma activity, Sigma activity, Slow oscillations
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 10:41
Last Modified : 17 May 2017 10:41
URI: http://epubs.surrey.ac.uk/id/eprint/828804

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