Title :
Evaluating current distribution on the surface of a stimulation electrode
Author :
Knisley, Stephen ; Johnson, Philip
Author_Institution :
Alabama Univ., Birmingham, AL, USA
fDate :
31 Oct-3 Nov 1996
Abstract :
Distribution of current on the surface of a stimulation electrode may influence distributions of effects of the stimulation in biological tissue. A method to study the current distribution at an electrode surface is described. A silver electrode in saline was imaged with a video camera during current pulses. Electrode darkening that corresponded to AgCl production by anodal current and lightening that corresponded to AgCl electrolysis by cathodal current were recorded from the video screen with phototransistors positioned on the electrode image. Inhomogeneous changes in electrode brightness were observed that indicated nonuniform current density. The method may be used to identify locations of high current on electrode surfaces
Keywords :
bioelectric phenomena; biological techniques; current distribution; electrodes; silver; Ag; AgCl; AgCl electrolysis; AgCl production; biological tissue; current distribution evaluation; current pulses; electrode brightness; electrode darkening; high current locations identification; inhomogeneous changes; nonuniform current density; saline; stimulation electrode surface; video camera imaging; Biological tissues; Brightness; Cameras; Current density; Current distribution; Electrochemical processes; Electrodes; Phototransistors; Production; Silver;
Conference_Titel :
Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-3811-1
DOI :
10.1109/IEMBS.1996.656868
