Circadian rhythm dissociation in the rat: effects of long-term constant illumination.
Long-term exposure to constant dim illumination dissociated the circadian activity rhythms of female rats. Evaluation of this phenomenon by visual and spectral analysis indicated that ultradian rhythms survive the breakdown of circadian organization.
D000818:Animals; D002940:Circadian Rhythm; D005260:Female; D008027:Light; D008297:Male; D009043:Motor Activity; D051381:Rats