Détails de la réservation
- Le : 27 July 2017
- De : 11 h 30
- à : 13 h 00
- Salle : Amphi Centre Broca Nouvelle - Aquitaine
Détails de l'évènement
Vincent LAURENT
PhD, UNSW Sydney
Australia's Global University / Kensington, NSW, Australia
"Excitatory and inhibitory stimuli exert contrasting effect on choice between actions"
Résumé
Humans and other animals have the capacity to extract predictive information from their environment to anticipate important events. This capacity entails learning about both excitatory stimuli that positively predict these events and about inhibitory stimuli that provide negative predictions. Here, I will present a series of experiments showing that excitatory and inhibitory stimuli can be dissociated by their respective influence on choice between actions.
Specifically, we found that a stimulus predicting a particular appetitive outcome guides choice towards actions earning that same outcome. In contrast, a stimulus predicting the absence of a particular outcome biases choice away from actions earning that outcome and towards actions delivering a different outcome. These opposing patterns of choice triggered by the two types of stimuli were observed in humans, rats and mice, and were found to rely on similar neural pathways, but also distinct ones.
These findings have at least two important implications. First, they suggest that the content of inhibitory learning can be highly specific. Second, they reveal that current theories of decision-making must be updated to explain the effects of inhibitory stimuli on choice between actions.
Invitant : Serge Ahmed, PhD, Team leader: Pathological decision-making in addiction / IMN
Responsable
- Nom : Ahmed Serge