AgingYoung
Muse
- Joined
- Dec 5, 2005
- Messages
- 973
I'm not a surgeon but here's something I dredged up from an article Copyright 1993,4 Wired Ventures, Ltd.
Gene
Visual prosthetics is still a long way from offering any major breakthroughs, though several promising directions are being explored. The goal of most of these schemes is to implant electrodes into the visual cortex of the brain to stimulate discernible patterns of phosphenes which can then be interpreted by the user. Phosphenes are those tiny dots (the proverbial stars) that can be seen after rubbing one's eyes or after getting beaned on the head. These phospenes originate in the brain and are responsive to electrocortical stimulation. Recently, Dr. Hambrecht and fellow researchers at the National Institutes of Health (NIH) implanted a 38-electrode array into the visual cortex of a blind woman's brain. She was able to see simple light patterns and to make out crude letters when the electrodes were stimulated.
Gene