A time course analysis of satiety-induced instrumental outcome devaluation
PARKES, Shauna
Institut de Neurosciences cognitives et intégratives d'Aquitaine [INCIA]
Nutrition et Neurobiologie intégrée [NutriNeuro]
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Institut de Neurosciences cognitives et intégratives d'Aquitaine [INCIA]
Nutrition et Neurobiologie intégrée [NutriNeuro]
PARKES, Shauna
Institut de Neurosciences cognitives et intégratives d'Aquitaine [INCIA]
Nutrition et Neurobiologie intégrée [NutriNeuro]
< Réduire
Institut de Neurosciences cognitives et intégratives d'Aquitaine [INCIA]
Nutrition et Neurobiologie intégrée [NutriNeuro]
Langue
EN
Article de revue
Ce document a été publié dans
Learning and Behavior. 2016, vol. 44, n° 4, p. 347-355
Résumé en anglais
Sensory-specific satiety is commonly used in studies of decision making to selectively devalue a food reward. Devaluation is reflected in an immediate reduction in the subsequent intake of the food and in the performance ...Lire la suite >
Sensory-specific satiety is commonly used in studies of decision making to selectively devalue a food reward. Devaluation is reflected in an immediate reduction in the subsequent intake of the food and in the performance of actions that gain access to that food. Despite its frequent use, the lasting effects of satiety-induced devaluation on instrumental actions are unknown. Here, we examined the time course and contextual dependency of sensory-specific satiety-induced devaluation on instrumental responding and consumption. Rats were trained to perform two instrumental actions for two distinct food rewards. Then, one of the instrumental outcomes was provided ad libitum for 1 hour in separate feeding cages and the effect of this devaluation was assessed 0, 2, or 5 hours after satiation. At a delay of 0 or 2 hours, both intake and instrumental responding were sensitive to the satiety treatment. That is, rats consumed less of the devalued outcome and responded less for the devalued outcome than for the valued outcome. By contrast, after 5 hours, rats showed sensitivity to devaluation in consumption but not in instrumental responding. Strikingly, sensitivity to devaluation was restored for the instrumental response after a 5 hour delay when devaluation was performed in the instrumental context. These results indicate that, in rats, specific satiety-induced devaluation endures and is context-independent for up to 2 hours post-satiation. At longer delays, the impact of sensory-specific satiety on instrumental responding is context-dependent, suggesting that contextual cues may be required for the value of specific outcomes to control instrumental responding.< Réduire
Mots clés en anglais
Sensory specific satiety
Devaluation
Context
Instrumental conditioning
Value
Projet Européen
International Mobility Programme to Strengthen Skills and Excellence in Research for Agriculture
Project ANR
Bases neuronales du comportement dirigé vers un but chez le Rat - ANR-14-CE13-0014
Unités de recherche