Challenging the estimation of cortical activity from MEG with simulated fMRI-constrained retinotopic maps.

Challenging the estimation of cortical activity from MEG with simulated fMRI-constrained retinotopic maps. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

Challenging the estimation of cortical activity from MEG with simulated fMRI-constrained retinotopic maps. Abstract Text:

Alexandre Gramfort,Benoit Cottereau,Maureen Clerc,Bertrand Thirion,Sylvain Baillet,

Detection of activity from the primary visual cortex is a difficult challenge to magneto-encephalography (MEG) source imaging techniques: the geometry of the visual cortex is intricate, with structured visual field maps extending deeper along the calcarine fissure. This questions the very sensitivity of MEG to the corresponding neural responses of visual stimuli and the usage of MEG source imaging for innovative retinotopic explorations. In this context, we compare two imaging models of MEG generators in realistic simulations of activations within the visual cortex. Localization and spatial extent of neural activity in the visual cortex were extracted from retinotopic maps obtained in fMRI. We prove that the suggested approaches are robust and succeed in accurately recovering the activation patterns with satisfactory match with fMRI results. These results suggest that fast retinotopic exploration of the visual cortex could be obtained from MEG as a complementary alternative to more standard fMRI approaches. The excellent time resolution of MEG imaging further opens interesting perspectives on the temporal and spectral processes sustained by the human visual system.

Challenging the estimation of cortical activity from MEG with simulated fMRI-constrained retinotopic maps. Publishing Authors By Initials

A Gramfort,B Cottereau,M Clerc,B Thirion,S Baillet,

For similar abstracts research abstracts see: abstracts research

PUBMED ID PMID:

MEDLINE DATE:

Challenging the estimation of cortical activity from MEG with simulated fMRI-constrained retinotopic maps. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Conference proceedings : ... Annual International

VOLUME: 1

Page Numbers: 4945-8

Journal Abbreviation:

ISSN: 1557-170X

DAY: 16

MONTH: 11

YEAR: 2007

Challenging the estimation of cortical activity from MEG with simulated fMRI-constrained retinotopic maps. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 101243413

Challenging the estimation of cortical activity from MEG with simulated fMRI-constrained retinotopic maps. Keywords Mesh Terms:

KEYWORDS:

MESH TERMS:

Chemical & Substance for Abstract: Challenging the estimation of cortical activity from MEG with simulated fMRI-constrained retinotopic maps. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for Challenging the estimation of cortical activity from MEG with simulated fMRI-constrained retinotopic maps.

AFFILIATION: Odyssée Project Team (ENPC - ENS - INRIA) alexandre.gramfort@sophia.inria.fr.

Country: United States

AGENCY:

GRANT:

ACRONYM:

MEDLINETA: Conf Proc IEEE Eng Med Biol So

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

Challenging the estimation of cortical activity from MEG with simulated fMRI-constrained retinotopic maps Related Publications

• Automatic Prediction of Infarct Growth in Acute Ischemic Stroke from MR Apparent Diffusion Coefficient Maps.
• Challenging the estimation of cortical activity from MEG with simulated fMRI-constrained retinotopic maps.
• Coherent neural representation of hand speed in humans revealed by MEG imaging.
• Modeling and Detecting Deep Brain Activity with MEG & EEG.
• Multiresolution imaging of MEG cortical sources using an explicit piecewise model.
• Neoadjuvant chemotherapy in the conservative management of breast cancer: a study of 252 patients.
• Neoadjuvant chemotherapy in the conservative management of breast cancers: study of 143 patients.
• Optical flow and advection on 2-riemannian manifolds: a common framework.
• Robust Nonparametric Segmentation of Infarct Lesion from Diffusion-Weighted MR Images.
• [Dynamic study of the diffusion and clearance of proteins in human interstitial tissue]
• [In Process Citation]
• [In Process Citation]
• [In Process Citation]
• [Not Available.]
• [Not Available.]
• [Not Available.]
• [Physiopathology of cardiac insufficiency; therapeutic indications.]
• [What may one think of the absence of 17-ketosteroids in the urines of most mammals?]