Resynchronization of circadian sleep-wake and temperature cycles in the squirrel monkey following phase shifts of the environmental light-dark cycle

Journal Article · Mon Dec 01 04:00:00 EST 1986 · Aviat., Space Environ. Med.; (United States)

OSTI ID:6793670

Wexler, D B; Moore-ede, M C

Circadian rhythms in physiological and behavioral functions gradually resynchronize after phase shifts in environmental time cues. In order to characterize the rate of circadian resynchronization in a diurnal primate model, the temperature, locomotor activity, and polygraphically determined sleep-wake states were monitored in squirrel monkeys before and after 8-h phase shifts of an environmental light-dark cycle of 12 h light and 12 h dark (LD 12:12). For the temperature rhythm, resynchronization took 4 d after phase delay shift and 5 d after phase advance shift; for the rest-activity cycle, resynchronization times were 3 d and 6 d, respectively. The activity acrophase shifted more rapidly than the temperature acrophase early in the post-delay shift interval, but this internal desynchronization between rhythms disappeared during the course of resynchronization. Further study of the early resynchronization process requires emphasis on identifying evoked effects and measuring circadian pacemaker function. 13 references.

• Research Organization: Harvard Univ., Boston, MA
• OSTI ID: 6793670
• Journal Information: Aviat., Space Environ. Med.; (United States), Journal Name: Aviat., Space Environ. Med.; (United States) Vol. 57; ISSN ASEMC
• Country of Publication: United States
• Language: English

Related Subjects

550100* -- Behavioral Biology
551000 -- Physiological Systems
59 BASIC BIOLOGICAL SCIENCES
ANIMALS
BEHAVIOR
BODY TEMPERATURE
DAILY VARIATIONS
MAMMALS
MONKEYS
PHASE SHIFT
PHYSIOLOGY
PRIMATES
SLEEP
VARIATIONS
VERTEBRATES
WORK