학술논문
Estimation and localization of electrical dipoles in somatosensory evoked potentials
Document Type
Conference
Author
Source
Proceedings of the Second Joint 24th Annual Conference and the Annual Fall Meeting of the Biomedical Engineering Society] [Engineering in Medicine and Biology Joint EMBS-BMES conference Engineering in Medicine and Biology, 2002. 24th Annual Conference and the Annual Fall Meeting of the Biomedical Engineering Society EMBS/BMES Conference, 2002. Proceedings of the Second Joint. 1:275-276 vol.1 2002
Subject
Language
ISSN
1094-687X
Abstract
Neuronal currents in the brain produce external magnetic fields and scalp surface potentials that can be measured using magnetoencephalography (MEG) and electroencephalography (EEG), respectively. In the context of the localization of neuronal sources, the forward problem is to determinate the potentials and magnetic fields that result from primary current sources. The inverse problem is to estimate the location of these primary current sources. Several algorithms have been applied to solve it. There are two kinds of such algorithms: Imaging methods, e.g. see R. D. Pascual-Marqui (1994), and parametric approaches. Here we present a revision of the MUSIC (J. C. Mosher et al., 1992) parametric algorithm and we analyze the effectiveness of this method with real EEG signals.