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Short‐term homeostasis of REM sleep assessed in an intermittent REM sleep deprivation protocol in the rat
Author(s) -
OCAMPOGARCÉS ADRIÁN,
VIVALDI ENNIO A.
Publication year - 2002
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.1365-2869.2002.00281.x
Subject(s) - sleep deprivation , sleep (system call) , non rapid eye movement sleep , rapid eye movement sleep , slow wave sleep , psychology , eye movement , privation , neuroscience of sleep , sleep debt , anesthesia , audiology , medicine , neuroscience , electroencephalography , circadian rhythm , computer science , operating system
An intermittent rapid eye movement (REM) sleep deprivation protocol was applied to determine whether an increase in REM sleep propensity occurs throughout an interval without REM sleep comparable with the spontaneous sleep cycle of the rat. Seven chronically implanted rats under a 12 : 12 light–dark schedule were subjected to an intermittent REM sleep deprivation protocol that started at hour 6 after lights‐on and lasted for 3 h. It consisted of six instances of a 10‐min REM sleep permission window alternating with a 20‐min REM sleep deprivation window. REM sleep increased throughout the protocol, so that total REM sleep in the two REM sleep permission windows of the third hour became comparable with that expected in the corresponding baseline hour. Attempted REM sleep transitions were already increased in the second deprivation window. Attempted transitions to REM sleep were more frequent in the second than in the first half of any 20‐min deprivation window. From one deprivation window to the next, transitions to REM sleep changed in correspondence to the amount of REM sleep in the permission window in‐between. Our results suggest that: (i) REM sleep pressure increases throughout a time segment similar in duration to a spontaneous interval without REM sleep; (ii) it diminishes during REM sleep occurrence; and (iii) that drop is proportional to the intervening amount of REM sleep. These results are consistent with a homeostatic REM sleep regulatory mechanism that operates in the time scale of spontaneous sleep cycle.