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Science 7 October 1977:
Vol. 198. no. 4312, pp. 56 - 58
DOI: 10.1126/science.197603
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Articles

Science, Vol 198, Issue 4312, 56-58
Copyright © 1977 by American Association for the Advancement of Science

articles

Synchronized ultradian cortisol rhythms in monkeys: persistence during corticotropin infusion

JW Holaday, HM Martinez, and BH Natelson

A highly synchronized ultradian cortisol rhythm with a predominant periodicity of 85 to 90 minutes was observed in eight isolated monkeys; this rhythm may be harmonically related to the circadian rhythm. The persistence of this synchronized rhythm during supramaximal infusions of adrenocorticotropin not only suggests that feedback is not causative but also challenges the classic concept that bursts of cortisol secretion are dependent upon an immediately preceding release of adrenocorticotropin.


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