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Titolo:
Light masking of circadian rhythms of heat production, heat loss, and bodytemperature in squirrel monkeys
Autore:
Robinson, EL; Fuller, CA;
Indirizzi:
Univ Calif Davis, Sect Neurobiol Physiol & Behav, Livermore, CA 95616 USA Univ Calif Davis Livermore CA USA 95616 & Behav, Livermore, CA 95616 USA
Titolo Testata:
AMERICAN JOURNAL OF PHYSIOLOGY-REGULATORY INTEGRATIVE AND COMPARATIVE PHYSIOLOGY
fascicolo: 2, volume: 45, anno: 1999,
pagine: R298 - R307
SICI:
0363-6119(199902)45:2<R298:LMOCRO>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORE TEMPERATURE; SAIMIRI-SCIUREUS; MELATONIN; THERMOREGULATION; HUMANS; SYSTEM;
Keywords:
direct calorimetry; indirect calorimetry; metabolism; thermoregulation; nonhuman primates; thermal balance;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Fuller, CA Univ Calif Davis, Sect Neurobiol Physiol & Behav, 1 Shields Ave, Livermore, Univ Calif Davis 1 Shields Ave Livermore CA USA 95616 ivermore,
Citazione:
E.L. Robinson e C.A. Fuller, "Light masking of circadian rhythms of heat production, heat loss, and bodytemperature in squirrel monkeys", AM J P-REG, 45(2), 1999, pp. R298-R307

Abstract

Whole body heat production (HP) and heat loss (HL) were examined to determine their relative contributions to light masking of the circadian rhythm in body temperature (T-b) Squirrel monkey metabolism (n = 6) was monitored by both indirect and direct calorimetry, with telemetered measurement of body temperature and activity. Feeding was also measured. Responses to an entraining light-dark (LD) cycle (LD 12:12) and a masking LD cycle (LD 2:2) were compared. HP and HL contributed to both the daily rhythm and the masking changes in T-b All variables showed phase-dependent masking responses. Masking transients at L or D transitions were generally greater during subjective day; however, L masking resulted in sustained elevation of T-b, HP, and HL during subjective night. Parallel, apparently compensatory, changes of HZ and HP suggest action by both the circadian timing system and Light masking on T-b set point. Furthermore, transient HL increases during subjective night suggest that gain change may supplement set point regulation of T-b.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 16/07/20 alle ore 05:56:49