Elsevier

Physiology & Behavior

Volume 45, Issue 2, February 1989, Pages 397-401
Physiology & Behavior

Article
Feeding cycles entrain circadian rhythms of locomotor activity in CS mice but not in C57BL/6J mice

https://doi.org/10.1016/0031-9384(89)90146-7Get rights and content

Abstract

The effects of periodic, restricted feeding (RF) for two hours at a fixed time of day on the circadian rhythms of locomotor activity were examined in CS and C57BL/6J mice, kept under continuous dim, red lights (LLdim). In C57BL/6J mice, free-running rhythms were not affected by an RF schedule, although anticipatory behavior prior to the food access period was observed. On the other hand, the free-running rhythms of CS mice did entrain to an RF schedule, exhibiting anticipatory behavior. The free-running rhythms of none of the control animals in either strain exhibited any effects resulting from the periodic disturbances occurring concurrently with the performance of RF. These results indicate that the circadian pacemaker couples with the food entrainable oscillator (FEO) in CS mice, but that such coupling may not exist, or may be very weak, in C57BL/6J mice.

References (26)

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