title: Spatial characterization of electric potentials generated by pulsed microelectrode arrays.
abstract: This presentation is a report on the in situ characterization of stimulating microelectrodes in the context of multielectrode retinal prosthetic implants. The experimental system approximately replicates the geometric and electrical parameters of Second Sight Medical Products' Argus II Retinal Implant. Topographic maps of electric potentials have been prepared for a 60 electrode structure in which selected electrodes were stimulated with biphasic repetitively pulsed charge densities at 100 microC·cm(-2). Surface contour maps were prepared using a 10 microm diameter recording electrode.
authors.affiliation: Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996, USA.
authors.forename: V
authors.initials: V
authors.lastname: Kandagor
authors.forename: C J
authors.initials: CJ
authors.lastname: Cela
authors.forename: C A
authors.initials: CA
authors.lastname: Sanders
authors.forename: E
authors.initials: E
authors.lastname: Greenbaum
authors.forename: G
authors.initials: G
authors.lastname: Lazzi
authors.forename: M S
authors.initials: MS
authors.lastname: Humayun
authors.forename: D M
authors.initials: DM
authors.lastname: Zhou
authors.forename: R
authors.initials: R
authors.lastname: Castro
authors.forename: S
authors.initials: S
authors.lastname: Gaikwad
authors.forename: J
authors.initials: J
authors.lastname: Little
mesh_terms: D004558:Electric Stimulation / Q000295:instrumentation*; D006801:Humans; D008564:Membrane Potentials; D008839:Microelectrodes; D055672:Static Electricity