Effective electrode configuration for selective stimulation with inner eye prostheses

Author

Rattay, Frank ; Resatz, Susanne

Author_Institution

Inst. of Anal. & Sci. Comput., Vienna Univ. of Technol., Austria

Volume

51

Issue

9

fYear

2004

Firstpage

1659

Lastpage

1664

Abstract

The quality of visual perception with retinal prostheses strongly depends on the local selectivity. Electrode arrays at the surface of the retina should excite exclusively cells within a local area but they are expected to co-stimulate bypassing axons originating from ganglion cells of the outer regions. Long electrodes parallel to these axons are shown to be good candidates for avoiding the co-stimulation phenomenon. Efficiency of focal excitation depends on the length and resistance of the electrodes.

Keywords

bioelectric phenomena; biomedical electrodes; cellular biophysics; eye; prosthetics; visual perception; bypassing axon electrical stimulation; cell excitation; effective electrode configuration; electrode arrays; electrode length; electrode resistance; ganglion cells; inner eye prostheses; retinal prostheses; selective stimulation; visual perception; Biomedical electrodes; Biomedical optical imaging; Computer simulation; Implants; Nerve fibers; Photoreceptors; Prosthetics; Retina; Scientific computing; Visual perception; Action Potentials; Animals; Axons; Blindness; Computer-Aided Design; Electric Stimulation; Electric Stimulation Therapy; Electrodes, Implanted; Equipment Design; Equipment Failure Analysis; Eye, Artificial; Humans; Microelectrodes; Models, Neurological; Reproducibility of Results; Retinal Ganglion Cells; Sensitivity and Specificity; Urodela;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/TBME.2004.828044

Filename

1325826