Capacitive electrodes in electroencephalography.
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.
von Ellenrieder
Nicolás
N
Laboratorio de Electrónica Industrial, Control e Instrumentación, Area Dept. Electrotecnia, Facultad de Ingeniería, Universidad Nacional de La Plata, La Plata, Argentina. mellen@ieee.org
Spinelli
Enrique
E
Muravchik
Carlos H
CH
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