منابع مشابه
the effect of functional/notional approach on the proficiency level of efl learners and its evaluation through functional test
in fact, this study focused on the following questions: 1. is there any difference between the effect of functional/notional approach and the structural approaches to language teaching on the proficiency test of efl learners? 2. can a rather innovative language test referred to as "functional test" ge devised so so to measure the proficiency test of efl learners, and thus be as much reliable an...
15 صفحه اولFunctional MRI
In the spring of 1991 the first of a group of new methods for mapping human brain function was successfully tested at the MRI Center of the Massachusetts General Hospital, in Boston. These methods use the supremely noninvasive technique of magnetic resonance imaging to create images of the brain that are sensitive to local changes in blood flow. In identification of cortical areas active for a ...
متن کاملAnalysis of Functional MRI
A new information-theoretic approach is presented for analyzing fMRI data to calculate the brain activation map. The method is based on a formulation of the mutual information between two waveforms{ the fMRI temporal response of a voxel and the experimental protocol timeline. Scores based on mutual information are generated for all voxels and then used to compute the activation map of an experi...
متن کاملPrinciples of Functional MRI
Kim fMRI Methods 2 1. Introduction The idea that regional cerebral blood flow (CBF) could reflect neuronal activity began with experiments of Roy and Sherrington at 1890 (1). This concept is the basis for all hemodynamic-based brain imaging techniques being used today. The focal increase in CBF can be considered to directly relate to neuronal activity because the glucose metabolism and CBF chan...
متن کاملA Primer on MRI and Functional MRI
Functional brain mapping with magnetic resonance imaging (MRI) is a rapidly growing field that has emerged in only the past several years. Functional MRI (fMRI) is the use of MRI equipment to detect regional changes cerebral metabolism or in blood flow, volume or oxygenation in response to task activation. The most popular technique utilizes blood oxygenation level dependent (BOLD) contrast, wh...
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ژورنال
عنوان ژورنال: Journal of Neuroradiology
سال: 2020
ISSN: 0150-9861
DOI: 10.1016/j.neurad.2020.09.001