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Food availability and daily biological rhythms.

Z Boulos, M Terman

Neuroscience and Biobehavioral Reviews

|January 1, 1980

Summary

Restricted feeding schedules synchronize rodent biological rhythms. A distinct food-entrained mechanism times anticipatory behaviors, separate from free-running circadian rhythms.

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Area of Science:

Chronobiology
Animal Behavior
Physiology

Background:

Restricted daily feeding schedules influence rodent biological functions.
Food intake directly impacts some rhythms, like drinking behavior and liver enzyme activity.

Purpose of the Study:

To investigate the synchronization of biological rhythms by restricted feeding schedules.
To differentiate between direct food influence and a distinct food-entrained circadian mechanism.

Main Methods:

Observational studies on rodents under restricted feeding schedules.
Analysis of various biological functions including behavior, enzyme activity, and physiological parameters.

Main Results:

Feeding schedules synchronize diverse rodent biological rhythms.
A separate food-entrained circadian mechanism times anticipatory activities like locomotion and lever-pressing.
This mechanism also influences body temperature, corticosterone, and intestinal enzyme activity.

Conclusions:

Rodents possess a food-entrained circadian mechanism distinct from free-running rhythms.
This mechanism aids in anticipating regular environmental events, such as food availability.

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