Publication Date:
1985-05-17
Description:
A single daily "surge" in pituitary luteinizing hormone release was observed in ovariectomized-estrogen-treated hamsters expressing an intact circadian rhythm of locomotor activity. In contrast, two luteinizing hormone surges occurred within a single 24-hour period in hamsters whose activity rhythm had dissociated or "split" into two distinct components. These observations indicate that both behavioral and endocrine circadian rhythms are regulated by the same multioscillator system, which seems to be composed of at least two distinct circadian oscillators.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Swann, J M -- Turek, F W -- HD-07068/HD/NICHD NIH HHS/ -- HD-09885/HD/NICHD NIH HHS/ -- K04 HD-00249/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1985 May 17;228(4701):898-900.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/4001926" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Castration
;
*Circadian Rhythm
;
Cricetinae
;
Estradiol/pharmacology
;
Female
;
Luteinizing Hormone/blood/*secretion
;
Mesocricetus
;
Motor Activity/*physiology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
