DSL and MUSIC under model misspecification and noise-conditions.
The concepts of both the traditional DSL (Dipole Source Localization) and MUSIC (MUltiple SIgnal Classification) are explained using simple vectors. DSL and MUSIC differ in the way the weighting functions are found. In both DSL and MUSIC, the fitted generator magnitudes are found by projecting the recorded potential map onto the fitted weighting functions, and the model transfers the weighting functions into generator locations/orientations. Both DSL and MUSIC will cause errors in the fitted dipole parameters when there is model misspecification, noise, or both. Therefore, an accurate head model is essential for either method to give reliable results.
Zhang
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Abratech Corporation, Research Division, Sausalito, California 94965.
Jewett
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D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D006801:Humans; D008959:Models, Neurological