Potent circadian effects of dim illumination at night in hamsters

Chronobiology International

Volumn 23, Issue 1-2, 2006, Pages 245-250

  Gorman, Michael R ^a,c   Evans, Jennifer A ^a   Elliott, Jeffrey A ^b  

^a UNIVERSITY OF CALIFORNIA   (United States)

^b UNIVERSITY OF CALIFORNIA   (United States)

^c NONE   (United States)

Author keywords

Circadian rhythms; Coupling; Dim light; Entrainment; Hamsters; Light intensity effects; Oscillator interactions; Splitting

Indexed keywords

ANIMAL EXPERIMENT; CIRCADIAN RHYTHM; CONFERENCE PAPER; FEMALE; LIGHT DARK CYCLE; LOCOMOTION; MALE; NONHUMAN; OSCILLATION; PHOTOPERIODICITY; RUNNING; SYRIAN HAMSTER;

ANIMALS; BIOLOGICAL CLOCKS; CIRCADIAN RHYTHM; CRICETINAE; FEMALE; LIGHT; MALE; MESOCRICETUS; OSCILLOMETRY; PHOTOPERIOD; PHYSICAL CONDITIONING, ANIMAL; TIME FACTORS;

ANIMALIA; CRICETINAE; MESOCRICETUS AURATUS; RODENTIA;

EID: 33646688457     PISSN: 07420528     EISSN: 15256073     Source Type: Journal    
DOI: 10.1080/07420520500521905     Document Type: Conference Paper

References (14)

1. Brainard, G.C., Richardson, B.A., Petterborg, L.J., Reiter, R.J. (1982). The effect of different light intensities on pineal melatonin content. Brain Res. 233:75-81.
2. Brainard, G.C., Richardson, B.A., Hurlbut, E.C., Steinlechner, S., Matthews, S.A., Reiter, R.J. (1984). The influence of various irradiances of artificial light, twilight, and moonlight on the suppression of pineal melatonin content in the Syrian hamster. J. Pineal Res. 1:105-119.
3. DeCoursey, P.J. (1990). Circadian photoentrainment in nocturnal mammals: ecological overtones. Biol. Behav. 15:213-237.
4. Elliott, J.A., Kripke, D.F. (1998). Photoperiodic regulation of light induced phase shifts and PRC amplitude in wild type male and female Syrian hamsters. Soc. Res. Biol. Rhyth. Abstr. 6:62.
5. Evans, J.A., Elliott, J.A., Gorman, M.R. (2005). Circadian entrainment and phase resetting differ markedly under dimly illuminated versus completely dark nights. Behav. Brain Res. 162:116-126.
6. Gorman, M.R., Elliott, J.A. (2004). Dim nocturnal illumination alters coupling of circadian pacemakers in Siberian hamsters (Phodopus sungorus). J. Comp. Physiol. A 190:631-639.
7. Gorman, M.R., Elliott, J.A., Evans, J.A. (2003). Plasticity of hamster circadian entrainment patterns depends on light intensity. Chronobiol. Int. 20:233-248.
8. Gorman, M.R., Kendall, M.E., Elliott, J.A. (2005). Scotopic illumination enhances entrainment of circadian rhythms to lengthening light:dark cycles. J. Biol. Rhythms. 20:38-48.
9. Nelson, D.E., Takahashi, J.S. (1991a). Sensitivity and integration in a visual pathway for circadian entrainment in the hamster (Mesocricetus auratus). J. Physiol. 439:115-145.
10. Nelson, D.E., Takahashi, J.S. (1991b). Comparison of visual sensitivity for suppression of pineal melatonin and circadian phase-shifting in the golden hamster. Brain Res. 554:272-277.
11. Pittendrigh, C., Elliott, J., Takamura, T. (1984). The circadian component in photoperiodic induction. CIBA Foundation Symposium. 104:26-47.
12. Podolin, P.L., Rollag, M.D., Brainard, G.C. (1987). The suppression of nocturnal pineal melatonin in the Syrian hamster: Dose-response curves at 500 and 360 nm. Endocrinology 121:266-270.
13. Takahashi, J.S., DeCoursey, P.J., Bauman, L., Menaker, M. (1984). Spectral sensitivity of a novel photoreceptive system mediating entrainment of mammalian circadian rhythms. Nature 308: 186-188.
14. Touitou, Y., Portaluppi, F., Smolensky, M.H., Rensing, L. (2004). Ethical principles and standards for the conduct of human and animal biological rhythm research. Chronobiol. Int. 21:161-170.