Premium
Age‐related modifications of NREM sleep EEG: from childhood to middle age
Author(s) -
Gaudreau H.,
Carrier J.,
Montplaisir J.
Publication year - 2001
Publication title -
journal of sleep research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 117
eISSN - 1365-2869
pISSN - 0962-1105
DOI - 10.1046/j.1365-2869.2001.00252.x
Subject(s) - non rapid eye movement sleep , electroencephalography , audiology , k complex , sleep (system call) , psychology , middle age , slow wave sleep , young adult , age groups , developmental psychology , medicine , demography , psychiatry , sociology , computer science , operating system
This study investigated the modifications in non‐rapid eye movement (NREM) sleep electroencephalogram (EEG) power in 54 subjects, from children to middle‐aged adults. Spectral analyses were performed on 5 h of NREM sleep. A marked decrease of absolute slow‐wave activity (SWA) was observed with increasing age; children had significantly more SWA than adolescents, young and middle‐aged adults. The decline of SWA across the night seems to level off with increasing age, suggesting an age‐related attenuation of homeostatic sleep pressure. Absolute theta power was higher for children compared with the other three groups, and adolescents had more theta power than young and middle‐aged adults. In comparison to young and middle‐aged adults, alpha power was higher for children and adolescents. Children and adolescents had more sigma power than middle‐aged adults. Absolute beta power was higher for children than for the other age groups. Therefore, the major alterations of NREM sleep EEG occurring between childhood and middle age are not restricted to SWA, but encompassed the theta, alpha, sigma and beta frequency bands.