Title :
Simulations of Electrode Placement for a Thalamic Visual Prosthesis
Author :
Pezaris, John S. ; Reid, R. Clay
Author_Institution :
Neurosurg. Dept., Massachusetts Gen. Hosp., Boston, MA
Abstract :
In this paper, placement parameters for microstimulation electrodes in a visual prosthesis are evaluated based on retinotopic models of macaque and human lateral geniculate nucleus. Phosphene patterns were simulated for idealized microwire electrodes as well as for currently available clinical electrodes. For idealized microwire electrodes, spacing as large as 600 mum in three dimensions would allow for over 250 phosphenes per visual hemifield in macaques, and over 800 in humans.
Keywords :
biomedical electrodes; eye; prosthetics; electrode placement; human lateral geniculate nucleus; macaque; microstimulation electrodes; phosphene pattern; thalamic visual prosthesis; Biomedical electrodes; Biomedical imaging; Brain modeling; Humans; Object recognition; Optical arrays; Prosthetics; Retina; Sampling methods; Satellite broadcasting; Visual prosthesis; Foveal magnification; lateral geniculate nucleus, LGN; visual prosthesis; Animals; Brain; Computer Simulation; Electrodes, Implanted; Fovea Centralis; Haplorhini; Humans; Microelectrodes; Microtechnology; Models, Neurological; Monte Carlo Method; Phosphenes; Prostheses and Implants; Statistics, Nonparametric; Thalamus; Visual Perception;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.2008.2005973
