Effect of elevated ambient temperature on sleep, EEG spectra, and brain temperature in the rat.

Détails

ID Serval
serval:BIB_932AC1BA7052
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Effect of elevated ambient temperature on sleep, EEG spectra, and brain temperature in the rat.
Périodique
American Journal of Physiology : Regulatory, Integrative and Comparative Physiology
Auteur(s)
Gao B.O., Franken P., Tobler I., Borbély A.A.
ISSN
0002-9513[print], 0002-9513[linking]
Statut éditorial
Publié
Date de publication
06/1995
Volume
268
Numéro
6 Pt 2
Pages
R1365-R1373
Langue
anglais
Notes
Publication types: Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
To examine the relationship between sleep and brain temperature in the rat, the vigilance states, spectral power density of the electroencephalogram (EEG), hypothalamic temperature (T(hy)), and cortical temperature (Tcr) were recorded for 3 days. A 1-day rise of ambient temperature from 23 to 30 degrees C did not affect the percentage of waking, non-rapid eye movement sleep (NREMS), and rapid eye movement sleep (REMS), but increased EEG slow-wave activity in NREMS in the 12-h dark period. T(hy) was invariably higher than Tcr, but at 30 degrees C the difference diminished because of a rise in Tcr. In contrast to Tcr, T(hy) was only slightly increased at 30 degrees C and only during sleep and in the dark period. Although the temperatures changed largely in parallel at vigilance state transitions, Tcr rose more rapidly than T(hy) at NREMS-REMS transitions and more slowly at NREMS-waking transitions. T(hy) declined more rapidly than Tcr at waking-NREMS transitions and more slowly at REMS-NREMS transitions. The results are consistent with a central role of the hypothalamus in the activation and deactivation of the waking state.
Mots-clé
Acclimatization, Analysis of Variance, Animals, Body Temperature, Brain/physiology, Cerebral Cortex/physiology, Circadian Rhythm, Electroencephalography, Electromyography, Hypothalamus/physiology, Male, Rats, Rats, Sprague-Dawley, Sleep/physiology, Sleep Stages/physiology, Sleep, REM/physiology, Temperature, Wakefulness/physiology
Pubmed
Création de la notice
24/01/2008 16:31
Dernière modification de la notice
03/03/2018 19:34
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