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Circadian and ultradian rhythms of plasma thyroid hormone concentrations in lactating dairy cows

Authors :
Bitman, Joel
Kahl, Stanislaw
Wood, D.L.
Lefcourt, Alan M.
Source :
The American Journal of Physiology. June, 1994, Vol. 266 Issue 6, pR1797, 7 p.
Publication Year :
1994

Abstract

Thyroid hormones T3 and T4 show circadian patterns in lactating dairy cows. The sinusoidal wave patterns reach their peak during morning and minimum points at night for T3 and T4, respectively. The circadian T4 rhythm resembles the circadian pattern, also exhibiting 90-min ultradian rhythms.

Subjects

Subjects :
Thyroid hormones -- Physiological aspects
Circadian rhythms -- Research
Lactation -- Physiological aspects
Biological sciences

Details

ISSN :
00029513
Volume :
266
Issue :
6
Database :
Gale General OneFile
Journal :
The American Journal of Physiology
Publication Type :
Academic Journal
Accession number :
edsgcl.15626315

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