... activity (Rw) rhythm from serum melatonin may occur in rats exposed to constant dim red light (LLdim, [15]) The aim of the present study was to further expand this finding by investigating the ... exposure to dim illumination may uncouple several circadian rhythms (e.g., sleep, body temperature, locomotor activity and drinking) in the rat [6] Internal desynchronization has been also reported in ... control, and, although the level of activity may influence the body temperature, the circadian rhythm of body temperature is not a mere consequence of the circadian rhythm of locomotor activity (Review...