Résumé
Circadian wheel-running rhythms were monitored continuously in 3 groups of female Sprague-Dawley rats under different palatable food availability schedules. All rats had free access to standard rat chow and water throughout the study. In addition, Group 1 rats received a palatable nutrient-rich mash for 2 hr each day for 28 days, beginning 3 hr after light onset of a 12:12 LD cycle. Group 2 rats received the same mash but were limited to 4 g daily. Group 3 rats received a palatable non-nutritive mash. Ten of 13 Group 1 rats, 2 of 13 Group 2 rats, and 0 of 13 Group 3 rats showed anticipatory running prior to the daily palatable meal. Palatable mash intake was generally lower among Group 3 rats than among Group 1 rats. However, several Group 3 rats consumed non-nutritive mash in amounts which equalled or exceeded the nutritive mash intake of Group 1 rats showing anticipatory running. The results indicate that temporally limited daily access to a palatable food can entrain anticipatory wheel-running in rats that are not food-deprived. They also indicate that entrainment to periodic food availability depends on stimuli associated with the concentrated intake of nutrients rather than on the absolute size or palatability of a meal.
| Langue d'origine | English |
|---|---|
| Pages (de-à) | 219-226 |
| Nombre de pages | 8 |
| Journal | Physiology and Behavior |
| Volume | 41 |
| Numéro de publication | 3 |
| DOI | |
| Statut de publication | Published - 1987 |
Note bibliographique
Funding Information:We thank Cathy Legacy-Barrett, Patricia Dickson and Tim De-laney for their capable technical assistance and Lauren Dewey for preparing the manuscript. This reasearch was supported by grants A0305 from NSERC and MA8929 from MRC of Canada, and an NSERC Postdoctoral Fellowship to R.E.M.
ASJC Scopus Subject Areas
- Experimental and Cognitive Psychology
- Behavioral Neuroscience
PubMed: MeSH publication types
- Journal Article
- Research Support, Non-U.S. Gov't