Influence of Skull Modeling Approaches on EEG Source Localization
نویسندگان
چکیده
منابع مشابه
Influence of skull conductivity perturbations on EEG dipole source analysis.
PURPOSE Electroencephalogram (EEG) source analysis is a noninvasive technique used in the presurgical of epilepsy. In this study, the dipole location and orientation errors due to skull conductivity perturbations were investigated in two groups of three-dimensional head models: A spherical head model and a realistic head model. METHODS In each group, the head model had a brain-to-skull conduc...
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The goal of this study was to investigate the influence of the brain-to-skull conductivity ratio (BSCR) on EEG source localization accuracy. In this study, we evaluated four BSCRs: 15, 20, 25, and 80, which were mainly discussed according to the literature. The scalp EEG signals were generated by BSCR-related forward computation for each cortical dipole source. Then, for each scalp EEG measurem...
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| The accuracy of the head model aaects on the solutions of the EEG inverse problems. If a simple three-sphere model and standard conductivity values for brain, skull and scalp regions are used, signifact errors may occur. One of the most sensitive head model parameters is the conductivity of the skull. A realistic three-dimensional nite-element model provides a method to study the eeect of inh...
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The low-conducting human skull is known to have an especially large influence on electroencephalography (EEG) source analysis. Because of difficulties segmenting the complex skull geometry out of magnetic resonance images, volume conductor models for EEG source analysis might contain inaccuracies and simplifications regarding the geometry of the skull. The computer simulation study presented he...
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Electromagnetic source localization (ESL) provides non-invasive evaluation of brain electrical activity for neurology research and clinical evaluation of neurological disorders such as epilepsy. Accurate ESL results are dependent upon the use of patient specific models of bioelectric conductivity. While the effects of anisotropic conductivities in the skull and white matter have been previously...
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ژورنال
عنوان ژورنال: Brain Topography
سال: 2013
ISSN: 0896-0267,1573-6792
DOI: 10.1007/s10548-013-0313-y