Estimating regional brain activity from evoked potential fields on the scalp

Author

Srebro, Richard ; Oguz, Rose M. ; Hughlett, Keith ; Purdy, Phillip D.

Author_Institution

Univ. of Texas Southwestern Med. Center, Dallas, TX, USA

Volume

40

Issue

6

fYear

1993

fDate

6/1/1993 12:00:00 AM

Firstpage

509

Lastpage

516

Abstract

Potential fields on the surface of the brain were estimated from discretely sampled scalp fields in human subjects. Relatively simple methods of linear algebra were combined with detailed anatomical information from magnetic resonance imaging. The method was verified using a tank model of the human head that encased a fully hydrated human skull in a polymer matrix of controlled resistivity matching that of human brain and scalp. Brain surface fields evoked by checkerboard contrast reversal spread less than their scalp field counterparts, and provided information helpful in localizing brain activity.

Keywords

bioelectric potentials; brain; vision; checkerboard contrast reversal; controlled resistivity polymer matrix; discretely sampled scalp fields; evoked potential fields; fully hydrated human skull; human head tank model; linear algebra; magnetic resonance imaging; regional brain activity; Anisotropic magnetoresistance; Brain modeling; Conductivity; Geometry; Head; Humans; Least squares approximation; Least squares methods; Linear algebra; Magnetic heads; Magnetic resonance imaging; Parameter estimation; Polymers; Scalp; Skull; Brain; Brain Mapping; Computer Simulation; Electroencephalography; Evoked Potentials; Humans; Magnetic Resonance Imaging; Models, Anatomic; Reference Values; Scalp; Signal Processing, Computer-Assisted;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/10.237670

Filename

237670