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Updated: Jul 6, 2026
Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
Published on: October 24, 2012
Quantitative approximation of the cortical surface potential from EEG and ECoG measurements
Mark A Kramer1, Andrew J Szeri
1Graduate Group in Applied Science and Technology, University of California, Berkeley, CA 94720-1708, USA. markram@berkeley.edu
Abstract:
A quantitative approximation of the cortical surface potential from measured scalp surface potential data is developed. The derivation is based on a local Taylor series expansion (TSE) in the surface normal coordinate. Analytical and numerical results for the four shell spherical head model show that the TSE method improves the spatial deblurring of the surface Laplacian method. The inclusion of the biharmonic term, the extension to other geometries, and the application to electrocorticogram measurements are discussed.
