TORPOR SHORTENS THE PERIOD OF SIBERIAN HAMSTER CIRCADIAN-RHYTHMS

被引：21

作者：

THOMAS, EM ^{[1
]}

JEWETT, ME ^{[1
]}

ZUCKER, I ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY,DEPT PSYCHOL,BERKELEY,CA 94720

来源：

AMERICAN JOURNAL OF PHYSIOLOGY | 1993年 / 265卷 / 04期

关键词：

TEMPERATURE; PHOTOPERIODISM; RUNNING WHEEL ACTIVITY; EXERCISE;

D O I：

10.1152/ajpregu.1993.265.4.R951

中图分类号：

Q4 [生理学];

学科分类号：

071003 ;

摘要：

We investigated the influence of ambient and body temperature (T(a) and T(b)) On circadian rhythms of gonadectomized male Siberian hamsters. Animals that entered torpor (T(b) < 30-degrees-C) had significantly shorter circadian periods (taus) than did nontorpid hamsters at a T(a) of 13-degrees-C (24.17 +/- 0.05 vs. 24.33 +/- 0.04 h). The taus of homeothermic hamsters were not affected by T(a) change. Short-term decreases in T(b), rather than changes in T(a), appear to affect tau. Access to activity wheels inhibited expression of torpor in short daylengths and was associated with significant increases in body mass. Running wheel activity can mask or block specific short-day responses.

引用

页码：R951 / R956

页数：6

共 30 条

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