The effect of high-fat diet consumption on appetitive instrumental behavior in rats
Idioma
EN
Article de revue
Este ítem está publicado en
Appetite. 2017, vol. 108, p. 203-211
Resumen en inglés
Evidence now indicates that the chronic consumption of high-calorie foods, such as a high-fat diet (HFD), is associated with impaired control over food-seeking, yet the extent of this alteration is not fully understood. ...Leer más >
Evidence now indicates that the chronic consumption of high-calorie foods, such as a high-fat diet (HFD), is associated with impaired control over food-seeking, yet the extent of this alteration is not fully understood. Using different reinforcement schedules, we evaluated whether HFD intake from weaning to adulthood modifies instrumental responding and induces a shift from goal-directed actions to habitual responding. We first observed reduced instrumental performance and motivation for a food reward in HFD-fed rats trained under schedules of reinforcement that facilitate habitual responding [Random Interval (RI)]. However, this deficit was alleviated if rats trained under RI were subsequently trained with reinforcement schedules that promote goal-directed strategies [Random Ratio (RR)]. Using an outcome devaluation procedure, we then demonstrated that consumption of a HFD promoted habitual behavior in rats trained under RI but not RR schedules. Finally, extended HFD exposure did not interfere with the ability of RR training to overcome impaired RI instrumental performance and to favor goal-directed behavior. These results indicate that chronic consumption of a HFD changes the co-ordination of goal-directed actions and habits and that alteration of food-seeking may be reversed under particular behavioral conditions.< Leer menos
Palabras clave en inglés
Action
Animals
Appetitive Behavior
Cognition Disorders
Diet
Diet
High-Fat
Feeding Behavior
Habit
Learning Disabilities
Male
Obesity
Operant conditioning
Outcome devaluation
Rats
Long-Evans
Reinforcement Schedule
Reward
Time Factors
Weaning
Conditioning Operant
Proyecto europeo
International Mobility Programme to Strengthen Skills and Excellence in Research for Agriculture
Proyecto ANR
Bases neuronales du comportement dirigé vers un but chez le Rat
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Impact neuro-cognitif de l'obésité juvénile: approches expérimentale et clinique
Centros de investigación