Title :
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
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;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.2004.828044
