Cortical neural prosthe sis for restoration of vision
Neuroscientist Feng Wang demonstrates that we can help blind people by "drawing" images in th eir brains.
Millions of people are blind due to damage between the eye and the brain. Glasses offer no solution for them. T he scientific problem is how we can "inject" visual information direc tly into the brain.
Wang's research question was whether we can generate recognizable patterns with a thousand electrodes, and wheth er this works for years. He proved that complex "pixel vision" is pos sible, but also discovered a "biological wall": scar tissue around ha rd sensors reduces the quality. This insight is crucial for the devel opment of future, flexible materials that last a lifetime.
In h is research, Wang demonstrates that we can help blind people by "draw ing" images directly into their brains. Wang placed a thousand tiny n eedles (electrodes) in the brains of monkeys. By stimulating these wi th small currents, they saw dots of light, just like pixels on a scre en. This allowed them to recognize letters and shapes without using t heir eyes.
Flexible materials
His main conc
lusion is that this works fantastically for recognizing images, but t
hat the body protests after a few years. Scar tissue forms around the
needles, causing the signal to fade. Wang and his colleagues have th
us proven that the technology works, but that in the future we need s
ofter, flexible materials that don't irritate the brain.
The fi ndings show that a functional "brain implant for vision" is technical ly feasible. For the millions of people who are currently completely blind, this means a future in which they can once again navigate inde pendently or read texts without being dependent on others.
Alth ough the researchers have proven that we can "draw" complex images in the brain, the concrete application for the general patient is not e xpected for another 10 to 20 years. The current "biological wall" fir st requires new, flexible materials. A concrete example is a blind pe rson who, thanks to the implant, can once again recognize traffic sig ns or see a grandchild's smile as a pattern of dots of light. This al igns with the current revolution in brain-computer interactions, as s een at companies like Neuralink.
Computer simulationsFor this research, Wang combined advanced laboratory exper iments with innovative computer simulations and clinical trials.
< p>First, the scientists implanted a record number of 1,000 electrodes into the visual cortex of test subjects to investigate whether they could convert artificial points of light into recognizable images, su ch as letters. Parallel to this, Wang developed computer simulations and algorithms to filter out electrical "noise," which is essential f or capturing clean brain signals during stimulation.Finally, t he researchers validated a new, automated system for visual field map ping in both monkeys and blind human volunteers. This multidisciplina ry approach enabled them to accurately map both the technical operati on and the long-term biological consequences of the brain implants.
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DESCRIPTION: Neuroscientist Feng Wang demonstrates that we can help blind people by "drawing" images in their brains. Mill ions of people are blind due to damage between the eye and the brain. Glasses offer no solution for them. The scientific problem is how we can "inject" visual information directly into the brain. Wang's rese arch question was whether we can generate recognizable patterns with a thousand electrodes, and whether this works for years. He proved th at complex "pixel vision" is possible, but also discovered a "biologi cal wall": scar tissue around hard sensors reduces the quality. This insight is crucial for the development of future, flexible materials that last a lifetime. In his research, Wang demonstrates that we can help blind people by "drawing" images directly into their brains. Wan g placed a thousand tiny needles (electrodes) in the brains of monkey s. By stimulating these with small currents, they saw dots of light, just like pixels on a screen. This allowed them to recognize letters and shapes without using their eyes. Flexible materials