Chunk #194 — 3 Inverse solutions — 3.1 Non parametric optimization methods — 3.1.4 Shrinking methods and multiresolution methods — S-MAP with iterative focusing

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Review on solving the inverse problem in EEG source analysis.

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where E c measures the contribution of every dipole source to the data and E a is an indicator of dipole relative magnitudes. Sources with energy greater than a certain threshold are selected for the next iteration. The estimator at the ith iteration is given by