Effects of hydrational state on ingestion in infant rats: is dehydration the only ingestive stimulus?
Journal Article (Journal Article)
The physiological stimulus for deprivation-enhanced ingestion was studied in developing rats. During an overnight deprivation period, continuous gastric infusions of isotonic saline or milk were made to 6- and 15-day-old rat pups in order to preferentially maintain hydrational or hydrational and nutritional status, respectively. Pups' ingestion was then studied in oral-infusion tests. In 6-day-old pups that received either milk or saline infusions, ingestion was depressed relative to intake in pups that were simply deprived. But in 15-day-old pups, only milk infusions reduced intake. These findings suggest that the increased ingestion stimulated by deprivation in pups less than a week of age results primarily from dehydration, and thus that nutrient-related feeding does not emerge until later in development.
Full Text
Duke Authors
Cited Authors
- Phifer, CB; Ladd, MD; Hall, WG
Published Date
- April 1991
Published In
Volume / Issue
- 49 / 4
Start / End Page
- 695 - 699
PubMed ID
- 1881971
Electronic International Standard Serial Number (EISSN)
- 1873-507X
International Standard Serial Number (ISSN)
- 0031-9384
Digital Object Identifier (DOI)
- 10.1016/0031-9384(91)90304-7
Language
- eng