Effects of suprachiasmatic nuclei lesions on circadian and ultradian rhythms in body temperature in ocular enucleated rats
作者:
J. F. Ruis,
W. J. Rietveld,
P. J. Buys,
期刊:
Journal of Interdisciplinary Cycle Research
(Taylor Available online 1987)
卷期:
Volume 18,
issue 4
页码: 259-273
ISSN:0022-1945
年代: 1987
DOI:10.1080/09291018709359952
出版商: Taylor & Francis Group
关键词: Circadian rhythms;Ultradian rhythms;Suprachiasmatic nuclei;Body Temperature
数据来源: Taylor
摘要:
To test the hypothesis that an oscillator located outside the suprachiasmatic nuclei (SCN) controls the circadian rhythm of body temperature, we conducted a study with 14 blinded rats, 10 of which receiving a SCN lesion. Body temperature was automatically and continuously recorded for about one month by intraperitoneal radio transmitters. Food intake, drinking and locomotor activity were also recorded. Periodograms revealed that 3 rats with histologically verified total bilateral SCN lesions did not exhibit any circadian rhythmicity. The 7 other rats appeared to have partial lesions. They showed shortening of period and severe amplitude reduction in all functions. Thus, no support was found for the hypothesis of a separate circadian ‘temperature oscillator’ located outside the SCN. Nevertheless, after large partial lesions body temperature showed more persistency than some of the other behavioral rhythms.
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