Diffusion tensor MRI-based estimation of the influence of brain tissue anisotropy on the effects of transcranial magnetic stimulation.

Détails

ID Serval
serval:BIB_A506DFDA6CA8
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Diffusion tensor MRI-based estimation of the influence of brain tissue anisotropy on the effects of transcranial magnetic stimulation.
Périodique
Neuroimage
Auteur(s)
De Lucia M., Parker G.J., Embleton K., Newton J.M., Walsh V.
ISSN
1053-8119[print], 1053-8119[linking]
Statut éditorial
Publié
Date de publication
2007
Volume
36
Numéro
4
Pages
1159-1170
Langue
anglais
Notes
Publication types: Journal Article
Résumé
We evaluate and discuss the relevance of fiber anisotropy in estimating the effect of transcranial magnetic stimulation (TMS) on the human brain. Finite element simulations were carried out on a three-dimensional model of the head that included anisotropic conductivity information derived from diffusion tensor imaging (DTI). The results show that anisotropy has minor effects both on the position of the main locus of activation and on its intensity. It has considerably more effect on the spatial distribution of the induced electric field, yielding differences of the order of 10% of the maximum induced field. Moreover the area affected by magnetic stimulation is slightly larger when we include fiber anisotropy in the calculations than in an isotropic model. We also show that the induced field observed in the anisotropic model does not always align with the local fiber orientation but rather follows specific patterns of parallelity. These findings will help to improve the estimation of the areas involved in magnetic stimulation.
Mots-clé
Anisotropy, Cerebral Cortex/physiology, Computer Simulation, Diffusion Magnetic Resonance Imaging, Finite Element Analysis, Humans, Image Processing, Computer-Assisted, Nerve Fibers/physiology, Software, Transcranial Magnetic Stimulation
Pubmed
Création de la notice
02/03/2011 11:31
Dernière modification de la notice
03/03/2018 20:14
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