منابع مشابه
fMRI retinotopic mapping--step by step.
fMRI retinotopic mapping provides detailed information about the correspondence between the visual field and its cortical representation in the individual subject. Besides providing for the possibility of unambiguously localizing functional imaging data with respect to the functional architecture of the visual system, it is a powerful tool for the investigation of retinotopic properties of visu...
متن کاملAbnormal retinotopic representations in human visual cortex revealed by fMRI.
The representation of the visual field in early visual areas is retinotopic. The point-to-point relationship on the retina is therefore maintained on the convoluted cortical surface. Functional magnetic resonance imaging (fMRI) has been able to demonstrate the retinotopic representation of the visual field in occipital cortex of normal subjects. Furthermore, visual areas that are retinotopic ca...
متن کاملfMRI reveals that non-local processing in ventral retinotopic cortex underlies perceptual grouping by temporal synchrony.
UNLABELLED When spatially separated objects appear and disappear in a synchronous manner, they perceptually group into a single global object that itself appears and disappears. We employed functional magnetic resonance imaging (fMRI) to identify brain regions involved in this type of perceptual grouping. Subjects viewed four chromatically-defined disks (one per visual quadrant) that flashed on...
متن کاملStep-by-step: the effects of physical practice on the neural correlates of locomotion imagery revealed by fMRI.
Previous studies have shown that mental imagery is a suitable tool to study the progression of the effect of practice on brain activation. Nevertheless, there is still poor knowledge of changes in brain activation patterns during the very early stages of physical practice. In this study, early and late practice stages of different kinds of locomotion (i.e., balanced and unbalanced) have been in...
متن کاملEvaluation of hierarchical Bayesian method through retinotopic brain activities reconstruction from fMRI and MEG signals
A hierarchical Bayesian method estimated current sources from MEG data, incorporating an fMRI constraint as a hierarchical prior whose strength is controlled by hyperparameters. A previous study [Sato, M., Yoshioka, T., Kajihara, S., Toyama, K., Goda, N., Doya, K., Kawato, M., 2004. Hierarchical Bayesian estimation for MEG inverse problem. Neuroimage 23, 806-826] demonstrated that fMRI informat...
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ژورنال
عنوان ژورنال: NeuroImage
سال: 2002
ISSN: 1053-8119
DOI: 10.1006/nimg.2002.1304