Entrainment of human circadian rhythms by artificial bright light cycles
- 114 Downloads
Artificial bright light cycles (LD 8∶16) of about 5000 lux during the light period were applied to two subjects in a temporal isolation unit, who had shown free-running circadian rhythms in sleep-wakefulness and rectal temperature. The circadian rhythms were successfully entrained by the artificial light cycle, but the phase relation of the rhythms to the light cycle was substantially different between the two subjects. The result indicated that the artificial bright lights are able to reset human circadian rhythms.
Key wordsHuman circadian rhythm entrainment artificial bright lights temporal isolation
Unable to display preview. Download preview PDF.
- 1.Wever, R., in: The Circadian System of Man. Springer-Verlag, Berlin 1979.Google Scholar
- 2.Aschoff, J., and Wever, R., in: Handbook of Behavioral Neurobiology, vol. 4, p. 311. Ed. J. Aschoff. Plenum Press, New York 1981.Google Scholar
- 3.Aschoff, J., Poeppel, E., and Wever, R., Pflügers Arch.306 (1969) 58.Google Scholar
- 4.Wever, R., Pflügers Arch.321 (1970) 133.Google Scholar
- 6.Wever, R., Polasek, J., and Wildgruber, C.M., Pflügers Arch.396 (1983) 85.Google Scholar
- 9.Honma, K., Honma, S., Wada, T., and Hiroshige, T., J. physiol. Soc. Japan47 (1985) 469.Google Scholar
- 10.Pittendrigh, C.S., in: Handbook of Behavioral Neurobiology, vol. 4, p. 95. Ed. J. Aschoff. Plenum Press, New York 1981.Google Scholar
- 11.Kramm, K.R., J. interdisc. Cycle Res.7 (1976) 127.Google Scholar
- 12.Honma, K., Honma, S., and Wada, T., J. physiol. Soc. Japan48 (1986) 416.Google Scholar