Seeing, since childhood, without ventral stream: a behavioural study.

Détails

ID Serval
serval:BIB_775BACF75800
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Seeing, since childhood, without ventral stream: a behavioural study.
Périodique
Brain
Auteur(s)
 S., Cardebat D., Boulanouar K., Hénaff M.A., Michel F., Milner D., Dijkerman C., Puel M., Démonet J.F.
ISSN
0006-8950 (Print)
ISSN-L
0006-8950
Statut éditorial
Publié
Date de publication
2002
Peer-reviewed
Oui
Volume
125
Numéro
Pt 1
Pages
58-74
Langue
anglais
Notes
Publication types: Case Reports ; Journal ArticlePublication Status: ppublish
Résumé
We report the case of a 30-year-old man (S.B.) who developed visual agnosia following a meningoencephalitis at the age of 3 years. MRI disclosed extensive bilateral lesions of the occipital temporal visual pathway (ventral stream) and lesions in the right dorsal pathway, sparing primary visual cortices. S.B. showed a severe visual recognition deficit (texture, colour, objects, faces and words), although movement and space perception were largely preserved. His remaining visual capacities illustrate the competence of an isolated dorsal system which essentially functions on the sole basis of magnocellular afferents (low spatial resolution, high sensitivity to low contrast and moving stimuli). Patient S.B. also shows remarkable visuomotor competences, despite his perceptual limitations. It is suggested that his perceptual capacities correspond to the visual processing limitations of the dorsal visual stream, which in this patient have become accessible to perceptual awareness.
Mots-clé
Adolescent, Adult, Agnosia/pathology, Agnosia/physiopathology, Child, Depth Perception, Humans, Magnetic Resonance Imaging, Male, Meningoencephalitis/complications, Neuropsychological Tests, Psychomotor Performance, Visual Cortex/pathology, Visual Pathways/pathology, Visual Pathways/physiopathology, Visual Perception/physiology
Pubmed
Web of science
Création de la notice
24/03/2013 18:30
Dernière modification de la notice
03/03/2018 18:27
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