Cited by 12Circadian rhythm and melatoninSleep and Wakefulness ResearchSleep and Work-Related Fatigue

Changes in motor activity during the development of the circadian rhythm in the rat

Cambras, T., Díez‐Noguera, A.·1988·Journal of Interdisiplinary Cycle Research

Abstract

Evolutive aspects of motor activity circadian rhythm have been studied in rats born and reared under LL, from the day of weaning. Motor activity was recorded by means of an optical detecting system that uses crossed infra‐red beams. Data were recorded every 30 min. A graphic method based in smoothing the double plotted chronograms by means of a moving average has been developed. Using this method, a decrease in motor activity is clearly seen while the circadian rhythm is appearing. This fact was confirmed (p<0.0001) by developing a statistical method, that consisted of the calculation of one statistic specially defined to test this hypothesis. Results show that the development of the motor activity rhythm of the rats is composed of three periods: The first one, where the rhythm is basically ultradian; the second one, characterized by a considerable decrease in the daily motor activity; and the third one where motor activity recovers its initial values and the circadian rhythm is well established. This decrease in motor activity could be related with the mechanisms of synchronization amongst the oscillators which drive the motor activity rhythm.

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Crossref · 10.1080/09291018809359965

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17 of 17 references verified0 citation errors · 0 not checkable

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  • There is a prevalence of ultradian components in the rhythms of young rodents under both entrained and free-running conditions which disappears in the post-weaning and pubertal periods.

    “For example, multiple authors have commented that there is a prevalence of ultradian components in the rhythms of young rodents under both entrained and free-running conditions which disappears in the post-weaning and pubertal periods [26, 38, 52, 76, 85, 93].”

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Authors
Cambras, T., & Díez‐Noguera, A.
Affiliations
Universitat de Barcelona (ES)
Venue
Journal of Interdisiplinary Cycle Research
Published
1988-03
Volume
19
Issue
1
Pages
65-74
ISSN
0022-1945 (ISSN-L)
OpenAlex
W1978771761
Cited by
12
References
17
Citations by year
2022: 1 · 2015: 1 · 2014: 1 · 2013: 1 · 2012: 1
FWCI
0.75
Type
journal article
Language
en
Open access
closed
Locations
Journal of Interdisiplinary Cycle Research (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
Keywords
circadian rhythm, motor activity, developmental changes, ultradian rhythms, rhythm synchronization, time-calibrated phylogeny, moving average smoothing, rats

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