Gambling against neglect: unconscious spatial biases induced by reward reinforcement in healthy people and brain-damaged patients.
Détails
ID Serval
serval:BIB_F115A64BC874
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Gambling against neglect: unconscious spatial biases induced by reward reinforcement in healthy people and brain-damaged patients.
Périodique
Cortex
ISSN
1973-8102 (Electronic)
ISSN-L
0010-9452
Statut éditorial
Publié
Date de publication
2013
Peer-reviewed
Oui
Volume
49
Numéro
10
Pages
2616-2627
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov'tPublication Status: ppublish
Résumé
Orienting attention in space recruits fronto-parietal networks whose damage results in unilateral spatial neglect. However, attention orienting may also be governed by emotional and motivational factors; but it remains unknown whether these factors act through a modulation of the fronto-parietal attentional systems or distinct neural pathways. Here we asked whether attentional orienting is affected by learning about the reward value of targets in a visual search task, in a spatially specific manner, and whether these effects are preserved in right-brain damaged patients with left spatial neglect. We found that associating rewards with left-sided (but not right-sided) targets during search led to progressive exploration biases towards left space, in both healthy people and neglect patients. Such spatially specific biases occurred even without any conscious awareness of the asymmetric reward contingencies. These results show that reward-induced modulations of space representation are preserved despite a dysfunction of fronto-parietal networks associated with neglect, and therefore suggest that they may arise through spared subcortical networks directly acting on sensory processing and/or oculomotor circuits. These effects could be usefully exploited for potentiating rehabilitation strategies in neglect patients.
Pubmed
Web of science
Création de la notice
24/01/2014 19:48
Dernière modification de la notice
20/08/2019 17:18