Reshaping the brain after stroke: The effect of prismatic adaptation in patients with right brain damage.

Détails

ID Serval
serval:BIB_14CF8062990C
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Reshaping the brain after stroke: The effect of prismatic adaptation in patients with right brain damage.
Périodique
Neuropsychologia
Auteur(s)
Crottaz-Herbette S., Fornari E., Notter M.P., Bindschaedler C., Manzoni L., Clarke S.
ISSN
1873-3514 (Electronic)
ISSN-L
0028-3932
Statut éditorial
Publié
Date de publication
09/2017
Peer-reviewed
Oui
Volume
104
Pages
54-63
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
Prismatic adaptation has been repeatedly reported to alleviate neglect symptoms; in normal subjects, it was shown to enhance the representation of the left visual space within the left inferior parietal cortex. Our study aimed to determine in humans whether similar compensatory mechanisms underlie the beneficial effect of prismatic adaptation in neglect. Fifteen patients with right hemispheric lesions and 11 age-matched controls underwent a prismatic adaptation session which was preceded and followed by fMRI using a visual detection task. In patients, the prismatic adaptation session improved the accuracy of target detection in the left and central space and enhanced the representation of this visual space within the left hemisphere in parts of the temporal convexity, inferior parietal lobule and prefrontal cortex. Across patients, the increase in neuronal activation within the temporal regions correlated with performance improvements in this visual space. In control subjects, prismatic adaptation enhanced the representation of the left visual space within the left inferior parietal lobule and decreased it within the left temporal cortex. Thus, a brief exposure to prismatic adaptation enhances, both in patients and in control subjects, the competence of the left hemisphere for the left space, but the regions extended beyond the inferior parietal lobule to the temporal convexity in patients. These results suggest that the left hemisphere provides compensatory mechanisms in neglect by assuming the representation of the whole space within the ventral attentional system. The rapidity of the change suggests that the underlying mechanism relies on uncovering pre-existing synaptic connections.
Mots-clé
Adaptation, Physiological/physiology, Adult, Analysis of Variance, Brain/diagnostic imaging, Brain/physiopathology, Brain Injuries/diagnostic imaging, Brain Injuries/etiology, Case-Control Studies, Female, Functional Laterality/physiology, Humans, Image Processing, Computer-Assisted, Lenses, Magnetic Resonance Imaging, Male, Middle Aged, Oxygen/blood, Perceptual Disorders/diagnostic imaging, Perceptual Disorders/etiology, Photic Stimulation, Reaction Time/physiology, Stroke/complications, Stroke/diagnostic imaging, Functional MRI, Neglect, Plasticity, Prismatic adaptation, Right hemispheric stroke
Pubmed
Web of science
Création de la notice
05/09/2017 17:19
Dernière modification de la notice
20/08/2019 13:43
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