Visuomotor performance in a patient with visual agnosia due to an early lesion.

Détails

ID Serval
serval:BIB_B6BF6EAE69FF
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Visuomotor performance in a patient with visual agnosia due to an early lesion.
Périodique
Brain Research. Cognitive Brain Research
Auteur(s)
Dijkerman H.C.,  S., Démonet J.F., Milner A.D.
ISSN
0926-6410 (Print)
ISSN-L
0926-6410
Statut éditorial
Publié
Date de publication
2004
Peer-reviewed
Oui
Volume
20
Numéro
1
Pages
12-25
Langue
anglais
Notes
Publication types: Case Reports ; Journal Article ; Research Support, Non-U.S. Gov'tPublication Status: ppublish. PDF type: Research report
Résumé
We tested a patient with visual agnosia who had suffered severe bilateral brain damage early in life, on a series of visuomotor tasks. The broad pattern of results confirms that S.B., like the extensively tested patient D.F., shows an impressive array of preserved skills, despite his severe perceptual problems. Also like D.F., S.B. shows certain subtle visuomotor difficulties that can be related to the idea that his partially intact occipito-parietal areas are unable to benefit from interactions with the apparently severely damaged occipito-temporal regions. Unlike D.F., however, he is able to make accurate discriminations of simple visual features, such as object width and orientation, albeit with very slow response times. We hypothesize that several factors such as the early onset of S.B.'s lesion and the long period since his brain lesion have allowed his brain to compensate to a degree what has been impossible in D.F., whose brain damage occurred in adulthood. This may include an element of 'rewiring' and self-monitoring of visuomotor processes that allow S.B. to achieve perceptual access to visual information processed in the dorsal stream: information that is normally only available for on-line visuomotor control.
Mots-clé
Adult, Agnosia/etiology, Agnosia/psychology, Discrimination (Psychology), Fingers/physiology, Form Perception/physiology, Hand Strength/physiology, Humans, Illusions/psychology, Imagination/physiology, Magnetic Resonance Imaging, Male, Orientation, Psychomotor Performance/physiology, Size Perception/physiology, Touch/physiology, Visual Perception/physiology
Pubmed
Création de la notice
24/03/2013 19:40
Dernière modification de la notice
03/03/2018 20:46
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