Learn More
The feasibility of producing a visual prosthesis for the blind using intracortical microstimulation (ICMS) of the visual cortex was studied in a 42-year-old woman who had been totally blind for 22 years secondary to glaucoma. Thirty-eight microelectrodes were implanted in the right visual cortex, near the occipital pole, for a period of 4 months. Percepts(More)
Abrtmct-One of the m jol problems in the design of neurophycio-logic extraaellulu micraelectrodes ir the application and seleetivc re-m o d of the insulation. In addition t o the usual problem8 of achieving pinhole-free coating m d reproducible tip exposurer 8nd impedances, duonic electrode ddgns have the additional requirement of maintaining-megohm kveb of(More)
We report on our efforts to establish an animal model for the development and testing of a cortical visual prostheses. One-hundred-fifty-two electrodes were implanted in the primary visual cortex of a rhesus monkey. The electrodes were made from iridium with an activated iridium oxide film, which has a large charge capacity for a given surface area, and(More)
Histochemical staining methods were applied to selected superficial forearm muscles of Macaca mulatta monkeys. The muscles were analyzed with regard to relative percentage distribution of different fiber types. In extensor carpi radialis brevis, extensor carpi radialis longus, and palmaris longus there was an even dispersion of each fiber type from the(More)