Effects of diurnal bright/dim light intensity on circadian core temperature and activity rhythms in the Japanese macaque.
Circadian rhythms of core temperature and activity were studied using three Japanese macaques under influences of two different light intensities during the daytime. Nocturnal core temperature and activity onset time were lower and advanced, respectively, in bright as compared to dim light. These results suggest the possibility that diurnal bright light could influence the circadian organization.
Takasu
Nana
N
Department of Environmental Health, Nara Women's University, Nara, 630-8506 Japan.
Nigi
Hideo
H
Tokura
Hiromi
H
D000818:Animals; D001522:Behavior, Animal / Q000502:physiology* / Q000528:radiation effects*; D001831:Body Temperature / Q000502:physiology* / Q000528:radiation effects*; D002940:Circadian Rhythm / Q000502:physiology* / Q000528:radiation effects*; D004307:Dose-Response Relationship, Radiation; D005260:Female; D008251:Macaca / Q000502:physiology*; D008297:Male