Remarkable similarities between the temporal organization of neocortical electrographic sleep patterns of rats and humans
Braz. j. med. biol. res
;
21(3): 599-601, Mar. 1988.
Article
in English
| LILACS
| ID: lil-60252
RESUMO
Electrocorticographic activity was automatically recorded in albino rats for 72 consecutive h and analyzed by procedures suitable to detect 24-h rhythms. Beta (alert wakefulness), theta (somnolence), delta (slow wave sleep) and sigma 1 (superficial synchronized sleep) activities showed a robust circadian rhythmic distribution. The acrophases (maxima of the adjusted cosine curve) occurred at 23:39, 07:59, 08:37 and 13:25 h, respectively. EMG atonia and extreme hypotonia (less than 10% of mean EMG level) episodes showed a 24-h rhythm peaking at 14:18 h. The temporal sequence within the circadian rest period, i.e., somnolence, slow, wave sleep, superficial synchronized sleep and paradoxical sleep, is very similar to that known to occur during the nocturnal sleep of humans
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Index:
LILACS (Americas)
Main subject:
Sleep
/
Cerebral Cortex
/
Circadian Rhythm
/
Electroencephalography
Limits:
Animals
/
Humans
/
Male
Language:
English
Journal:
Braz. j. med. biol. res
Journal subject:
Biology
/
Medicine
Year:
1988
Type:
Article
/
Congress and conference
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