Effective electrode configuration for selective stimulation with inner eye prostheses

IEEE Trans Biomed Eng. 2004 Sep;51(9):1659-64. doi: 10.1109/TBME.2004.828044.

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.

Publication types

  • Comparative Study
  • Evaluation Study
  • Validation Study

MeSH terms

  • Action Potentials / physiology
  • Animals
  • Axons / physiology
  • Blindness / rehabilitation*
  • Computer-Aided Design
  • Electric Stimulation / instrumentation*
  • Electric Stimulation / methods
  • Electric Stimulation Therapy / instrumentation*
  • Electric Stimulation Therapy / methods
  • Electrodes, Implanted*
  • Equipment Design
  • Equipment Failure Analysis / methods*
  • Eye, Artificial
  • Humans
  • Microelectrodes
  • Models, Neurological*
  • Reproducibility of Results
  • Retinal Ganglion Cells / physiology*
  • Sensitivity and Specificity
  • Urodela