title: Capacitive electrodes in electroencephalography.
abstract: We present a forward problem formulation for computing biopotentials measured with dry or capacitive electrodes. This formulation is not quasistatic and has mixed boundary conditions. Our results show that simple approximations to the measurements based on capacitive coupling are adequate in most situations. We study the range of validity and errors committed in the EEG forward and inverse problems when using this approximation.
authors.affiliation: Laboratorio de Electrónica Industrial, Control e Instrumentación, Area Dept. Electrotecnia, Facultad de Ingeniería, Universidad Nacional de La Plata, La Plata, Argentina. mellen@ieee.org
authors.forename: Nicolás
authors.initials: N
authors.lastname: von Ellenrieder
authors.forename: Enrique
authors.initials: E
authors.lastname: Spinelli
authors.forename: Carlos H
authors.initials: CH
authors.lastname: Muravchik
mesh_terms: D001921:Brain / Q000502:physiology*; D001931:Brain Mapping / Q000295:instrumentation / Q000379:methods; D003198:Computer Simulation; D017076:Computer-Aided Design; D025802:Electric Capacitance; D004566:Electrodes; D004569:Electroencephalography / Q000295:instrumentation* / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D008959:Models, Neurological