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On the localization of oscillatory sources from (S)EEG recordings


Electrophysiological brain source localization consists in estimating the source positions and activities responsible for the (S)EEG measurements. The localization procedure is usually carried out in the time domain, however in specific situations the activities of interest can be located at well defined frequencies, e.g. in response to a rhythmic stimulation. This paper addresses the problem of sparse localization of multiple sources oscillating at the same frequency. In particular the non-unicity of the solution is emphasized, as alternative source maps involving equivalent or less number of sources can be found, challenging source localization methods based on sparsity. These limitations are illustrated under a realistic SEEG simulation framework, and the usefulness to perform localization for this modality is strengthen out.
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hal-03780775 , version 1 (19-09-2022)



Viviana del Rocio Hernandez-Castanon, Steven Le Cam, Radu Ranta. On the localization of oscillatory sources from (S)EEG recordings. 44th Annual International Conference of the IEEE Engineering in Medicine & Biology Society, EMBC 2022, Jul 2022, Glasgow, France. ⟨10.1109/EMBC48229.2022.9871931⟩. ⟨hal-03780775⟩
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