Theta wave amplitude and frequency are differentially correlated with pontine waves and rapid eye movements during REM sleep in rats

The present study examined the correlations between the dynamics of hippocampal theta waves and pontine waves (P waves) and rapid eye movements (REMs) densities during REM sleep. Theta wave peak frequency and theta amplitude were estimated as the parameters of theta wave dynamics in each 3 s segment...

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Bibliographic Details
Published in:Neuroscience research 2004-11, Vol.50 (3), p.283-289
Main Authors: Karashima, Akihiro, Nakao, Mitsuyuki, Honda, Kazuki, Iwasaki, Naoko, Katayama, Norihiro, Yamamoto, Mitsuaki
Format: Article
Language:English
Subjects:
Animals
Cerebellum - physiology
Correlations
Hippocampal theta wave
P wave
PGO wave
Pons - physiology
Rapid eye movements
Rats
Rats, Sprague-Dawley
REM sleep
Sleep, REM - physiology
Theta Rhythm - methods
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Summary:The present study examined the correlations between the dynamics of hippocampal theta waves and pontine waves (P waves) and rapid eye movements (REMs) densities during REM sleep. Theta wave peak frequency and theta amplitude were estimated as the parameters of theta wave dynamics in each 3 s segment. The peak frequency and theta amplitude were positively correlated with P wave and REMs densities, however their detailed correlation properties were distinct from each other. Dependency of peak frequency on P wave/REMs density did not change significantly from that on REMs/P wave density. On the other hand, dependency of the theta amplitude on P wave/REMs density significantly increased with an increased REMs/P wave density. Because hippocampal theta waves and P waves are involved in learning and memory functions during REM sleep, the correlation between theta parameters and P wave density might help to clarify these functions.
ISSN:0168-0102
1872-8111
DOI:10.1016/j.neures.2004.07.007