Effective electrode configuration for selective stimulation with inner eye prostheses.
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.
Rattay
Frank
F
Institute of Analysis and Scientific Computing, Vienna University of Technology, A-1040 Vienna, Austria. frank.rattay@tuwien.ac.at
Resatz
Susanne
S
D000200:Action Potentials / Q000502:physiology; D000818:Animals; D001369:Axons / Q000502:physiology; D001766:Blindness / Q000534:rehabilitation*; D017076:Computer-Aided Design; D004558:Electric Stimulation / Q000295:instrumentation* / Q000379:methods; D004599:Electric Stimulation Therapy / Q000295:instrumentation* / Q000379:methods; D004567:Electrodes, Implanted; D004867:Equipment Design; D019544:Equipment Failure Analysis / Q000379:methods*; D005137:Eye, Artificial; D006801:Humans; D008839:Microelectrodes; D008959:Models, Neurological; D015203:Reproducibility of Results; D012165:Retinal Ganglion Cells / Q000502:physiology*; D012680:Sensitivity and Specificity; D014562:Caudata