منابع مشابه
Nonlinear dynamic causal models for fMRI
Models of effective connectivity characterize the influence that neuronal populations exert over each other. Additionally, some approaches, for example Dynamic Causal Modelling (DCM) and variants of Structural Equation Modelling, describe how effective connectivity is modulated by experimental manipulations. Mathematically, both are based on bilinear equations, where the bilinear term models th...
متن کاملComparing dynamic causal models.
This article describes the use of Bayes factors for comparing dynamic causal models (DCMs). DCMs are used to make inferences about effective connectivity from functional magnetic resonance imaging (fMRI) data. These inferences, however, are contingent upon assumptions about model structure, that is, the connectivity pattern between the regions included in the model. Given the current lack of de...
متن کاملDynamic models in fMRI.
Most statistical methods for assessing activated voxels in fMRI experiments are based on correlation or regression analysis. In this context, the main assumptions are that the baseline can be described by a few known basis functions or variables and that the effect of the stimulus, i.e., the activation, stays constant over time. As these assumptions are in many cases neither necessary nor corre...
متن کاملDynamic models in fMRI
Most statistical methods for assessing activated voxels in fMRI experiments are based on correlation or regression analysis In this context the main assumptions are that the baseline can be described by a few known basis functions or variables and that the e ect of the stimulus i e the activation stays constant over time As these assumptions are in many cases neither necessary nor correct a new...
متن کاملConnectivity-based neurofeedback: Dynamic causal modeling for real-time fMRI☆
Neurofeedback based on real-time fMRI is an emerging technique that can be used to train voluntary control of brain activity. Such brain training has been shown to lead to behavioral effects that are specific to the functional role of the targeted brain area. However, real-time fMRI-based neurofeedback so far was limited to mainly training localized brain activity within a region of interest. H...
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ژورنال
عنوان ژورنال: NeuroImage
سال: 2008
ISSN: 1053-8119
DOI: 10.1016/j.neuroimage.2008.04.262