The first-night effect may last more than one night

Citation
O. Le Bon et al., The first-night effect may last more than one night, J PSYCH RES, 35(3), 2001, pp. 165-172
Citations number
38
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Psychiatry,"Clinical Psycology & Psychiatry","Neurosciences & Behavoir
Journal title
JOURNAL OF PSYCHIATRIC RESEARCH
ISSN journal
0022-3956 → ACNP
Volume
35
Issue
3
Year of publication
2001
Pages
165 - 172
Database
ISI
SICI code
0022-3956(200105/06)35:3<165:TFEMLM>2.0.ZU;2-S
Abstract
The first-night effect in sleep polysomnographic studies is usually conside red to last for one night. However, a few observations have indicated that variables associated to rapid eye movement sleep take longer to stabilize. Notwithstanding, current opinion holds that second nights of recording can be used without restriction for research and clinical purposes. The goal of this study was to describe the dynamics of habituation to polysomnography in optimal conditions. Twenty-six young, carefully screened, healthy subjec ts were recorded in their home for four consecutive full polysomnographies. Repeated measures ANOVA were applied. Between the two first nights, while there were no differences in sleep duration in non-rapid eye movement sleep , marked modifications in corresponding spectral power were observed. The d ynamics of adaptation of rapid eye movement sleep appeared to be a process extending up to the fourth night. Similar dynamics in NREMS and REMS homeos tasis have been observed in sleep deprivation studies, and it appears that the same mechanisms may be responsible for the FNE. The longer habituation process of REMS in particular has important implications for sleep research in psychiatry. (C) 2001 Elsevier Science Ltd. All rights reserved.