Publication Date:
1983-01-07
Description:
The length of day, or photoperiod, regulates the annual cycle of reproductive activity in the golden hamster. The inhibitory effects of a short-day photoperiod on testicular function were prevented by nighttime, but not daytime, intraventricular injections of carbachol, a cholinergic agonist. Short pulses of light during the night also block short-day induced testicular regression. The findings suggest that acetylcholine may play an important role in the mechanism through which information about the light-dark environment is transferred to the hypothalamic-pituitary-gonadal axis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Earnest, D J -- Turek, F W -- HD-00249/HD/NICHD NIH HHS/ -- HD-09885/HD/NICHD NIH HHS/ -- HD-12622/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1983 Jan 7;219(4580):77-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6849121" target="_blank"〉PubMed〈/a〉
Keywords:
Acetylcholine/*physiology
;
Animals
;
Carbachol/pharmacology
;
Cricetinae
;
*Light
;
Male
;
Mesocricetus
;
*Reproduction
;
Testis/physiology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
