Prismatic adaptation changes visuospatial representation in the inferior parietal lobule.

Détails

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Etat: Public
Version: Final published version
ID Serval
serval:BIB_2C61134FC2A9
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Prismatic adaptation changes visuospatial representation in the inferior parietal lobule.
Périodique
Journal of Neuroscience
Auteur(s)
Crottaz-Herbette S., Fornari E., Clarke S.
ISSN
1529-2401 (Electronic)
ISSN-L
0270-6474
Statut éditorial
Publié
Date de publication
2014
Peer-reviewed
Oui
Volume
34
Numéro
35
Pages
11803-11811
Langue
anglais
Notes
Publication types: Journal Article Publication Status: ppublish
Résumé
Prismatic adaptation has been shown to induce a realignment of visuoproprioceptive representations and to involve parietocerebellar networks. We have investigated in humans how far other types of functions known to involve the parietal cortex are influenced by a brief exposure to prismatic adaptation. Normal subjects underwent an fMRI evaluation before and after a brief session of prismatic adaptation using rightward deviating prisms for one group or after an equivalent session using plain glasses for the other group. Activation patterns to three tasks were analyzed: (1) visual detection; (2) visuospatial short-term memory; and (3) verbal short-term memory. The prismatic adaptation-related changes were found bilaterally in the inferior parietal lobule when prisms, but not plain glasses, were used. This effect was driven by selective changes during the visual detection task: an increase in neural activity was induced on the left and a decrease on the right parietal side after prismatic adaptation. Comparison of activation patterns after prismatic adaptation on the visual detection task demonstrated a significant increase of the ipsilateral field representation in the left inferior parietal lobule and a significant decrease in the right inferior parietal lobule. In conclusion, a brief exposure to prismatic adaptation modulates differently left and right parietal activation during visual detection but not during short-term memory. Furthermore, the visuospatial representation within the inferior parietal lobule changes, with a decrease of the ipsilateral hemifield representation on the right and increase on the left side, suggesting thus a left hemispheric dominance.
Pubmed
Web of science
Open Access
Oui
Création de la notice
02/10/2014 17:29
Dernière modification de la notice
20/08/2019 13:11
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