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Inverse source problems in electro- and magneto- encephalography

Abstract : Electro- and Magneto- encephalography (EEG and MEG) are measuring non-invasively the post- synaptic brain electrical activity. At each time instant, EEG and MEG provide a few hundreds of measurements at the scalp (or near) level, and these measurements can be obtained at about a millisecond time resolution. In the frequency domain of interest for brain signals, the electromagnetic propagation over the head is governed by the quasi-static approximation. The inverse problem of source localisation seeks to identify the cortical electrical sources from the measurements. As the cortex is a very convoluted surface, it is usually modeled with several thousand variables, which make the source localisation an ill-posed problem. We will explore several strategies to solve this inverse problem with different strategies to regularize this ill-posed problem.
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https://hal.inria.fr/hal-01963644
Contributor : Théodore Papadopoulo <>
Submitted on : Friday, December 21, 2018 - 2:33:57 PM
Last modification on : Wednesday, October 14, 2020 - 4:22:19 AM

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  • HAL Id : hal-01963644, version 1

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Théodore Papadopoulo. Inverse source problems in electro- and magneto- encephalography. Inverse problems: modeling and simulation, May 2018, Paradise Bay, Malta. ⟨hal-01963644⟩

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