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Physiol Behav ; 78(2): 311-20, 2003 Feb.
Article in English | MEDLINE | ID: mdl-12576130

ABSTRACT

In order to determine the respective roles of conditioned food aversion, satiety and palatability, we studied behavioral responses to a 50% total milk protein diet, compared with those to a normal protein diet containing 14% total milk protein. Different paradigms were employed, including meal pattern analysis, two-choice testing, flavor testing, a behavioral satiety sequence (BSS) and taste reactivity. Our experiments showed that only behavioral and food intake parameters were disturbed during the first day when an animal ate the high-protein (P50) diet, and that most parameters returned to baseline values as soon as the second day of P50. Rats adapted to P50 did not acquire a conditioned taste aversion (CTA) but exhibited satiety, and a normal BSS. The initial reduction in high-protein diet intake appeared to result from the lower palatability of the food combined with the satiety effect of the high-protein diet and the delay required for metabolic adaptation to the higher protein level.


Subject(s)
Milk Proteins/administration & dosage , Satiety Response/drug effects , Animals , Animals, Newborn/growth & development , Animals, Newborn/psychology , Avoidance Learning , Behavior, Animal/drug effects , Choice Behavior , Conditioning, Psychological , Dose-Response Relationship, Drug , Feeding Behavior/drug effects , Food Preferences , Grooming , Male , Motor Activity , Rats , Rats, Wistar , Rest , Taste
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