| Computational and entrainment models of circadian food-anticipatory activity: evidence from non-24-hr feeding schedules. | |
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MedLine Citation:
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PMID: 7576223 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Rats anticipate a daily meal, provided that meal onset intervals are within a circadian (22-31 hr) range. Food-anticipatory activity (FAA) has been interpreted as evidence for a food-entrained circadian pacemaker or for a computational process that uses stored representations of pacemaker phase. The models make different predictions concerning the symmetry and history dependence of the circadian limits to FAA. To test those predictions, rats were entrained to 24-hr light-dark and feeding cycles and then exposed to feeding cycles of 21, 22, 25, 26, or 27 hr. Rats showed strong FAA to feeding cycles > or = 24 hr, but not to schedules < 24 hr. Prior exposure to long cycles did not promote anticipation under short cycles. Meal omission tests confirmed that failure to observe FAA to < 24-hr feeding cycles was not a result of masking by early mealtimes. These and other aspects of the results are consistent with the entrained oscillator model of FAA. |
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Authors:
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R E Mistlberger; E G Marchant |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Behavioral neuroscience Volume: 109 ISSN: 0735-7044 ISO Abbreviation: Behav. Neurosci. Publication Date: 1995 Aug |
Date Detail:
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Created Date: 1995-12-06 Completed Date: 1995-12-06 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8302411 Medline TA: Behav Neurosci Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 790-8 Citation Subset: IM |
Affiliation:
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Department of Psychology, Simon Fraser University, Burnaby, British Columbia, Canada. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Appetitive Behavior* Association Learning Circadian Rhythm* Feeding Behavior* Male Rats Rats, Wistar Reinforcement Schedule |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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