Quantitative approximation of the cortical surface potential from EEG and ECoG measurements

Author

Kramer, Mark A. ; Szeri, Andrew J.

Author_Institution

Graduate Group in Appl. Sci. & Technol., Univ. of California, Berkeley, CA, USA

Volume

51

Issue

8

fYear

2004

Firstpage

1358

Lastpage

1365

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.

Keywords

bioelectric potentials; electroencephalography; physiological models; ECoG; EEG; cortical surface potential; four shell spherical head model; local Taylor series expansion; scalp surface potential; spatial deblurring; surface Laplacian method; Brain modeling; Current density; Electroencephalography; Geometry; Head; Laplace equations; Scalp; Skull; Spatial resolution; Taylor series; Algorithms; Brain Mapping; Cerebral Cortex; Diagnosis, Computer-Assisted; Electroencephalography; Humans; Models, Neurological; Scalp;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/TBME.2004.827264

Filename

1315857