Two possible determinants of the timing of daily episodes of behavior in rats.

@article{Widman1995TwoPD,
  title={Two possible determinants of the timing of daily episodes of behavior in rats.},
  author={D R Widman and W. D. Timberlake},
  journal={Physiology & behavior},
  year={1995},
  volume={58 6},
  pages={1227-36}
}
The present experiment examined endogenous ultradian rhythms and regulatory metabolic processes as two potential determinants of daily out-of-nest episodes (ONEs) and feeding episodes (FEs) in rats living in a 24-h environment. Two types of photoperiod were used: a Standard 12:12 h L/D schedule and a Skeleton 12:12 h schedule. During each type of photoperiod rats were exposed to 4 feeding conditions of 7 to 12 days each: (a) a baseline of ad lib food and water; (b) restricted to the diurnal… CONTINUE READING