Virtual lesion of ventral premotor cortex impairs visual perception of biomechanically possible but not impossible actions.

Détails

Ressource 1Demande d'une copieEtat: Supprimée
Version: Final published version
ID Serval
serval:BIB_BDCC38357C7B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Virtual lesion of ventral premotor cortex impairs visual perception of biomechanically possible but not impossible actions.
Périodique
Social Neuroscience
Auteur(s)
Candidi M., Urgesi C., Ionta S., Aglioti S.M.
ISSN
1747-0927 (Electronic)
ISSN-L
1747-0919
Statut éditorial
Publié
Date de publication
2008
Peer-reviewed
Oui
Volume
3
Numéro
3-4
Pages
388-400
Langue
anglais
Résumé
Single-pulse transcranial magnetic stimulation (TMS) studies show that action observation facilitates the onlooker's cortico-spinal system supporting the notion of motor mirroring. Repetitive transcranial magnetic stimulation (rTMS) over ventral premotor cortex (vPMc) impairs visual discrimination of body actions. Although studies suggest that the action observation-execution matching system may map only actions that belong to the observer's motor repertoire, we demonstrated comparable motor and premotor facilitation during observation of biomechanically possible as well as impossible actions. It has also been shown that seeing impossible body movements activates the extrastriate body area (EBA). Using event-related rTMS, we sought to determine whether vPMc and EBA are actively involved in the visual discrimination of actions performed through biomechanically possible or impossible kinematics and of their biomechanical plausibility. Stimulation of vPMc impaired discrimination of possible actions while leaving intact the discrimination of biomechanically impossible actions and of biomechanical plausibility. No effect of EBA rTMS on any type of action processing was found. Thus, vPMc is crucial for discrimination of the goal of actions that can be actually performed suggesting that this area is involved in the visual processing of goal-directed actions.
Mots-clé
Biomechanical Phenomena, Brain Mapping, Discrimination (Psychology)/physiology, Electric Stimulation, Female, Functional Laterality, Humans, Male, Movement/physiology, Perceptual Disorders/physiopathology, Photic Stimulation/methods, Reaction Time/physiology, Transcranial Magnetic Stimulation/adverse effects, Visual Cortex/injuries, Visual Cortex/physiology, Visual Perception/physiology
Pubmed
Web of science
Création de la notice
04/02/2015 11:10
Dernière modification de la notice
03/03/2018 20:59
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