People who have been blind from birth make use of the visual parts of their brain to refine their sensation of sound and touch, according to an international team of researchers led by neuroscientists at Georgetown University Medical Center.
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Saturday, December 4, 2010
Blind persons do use the visual parts of their brains !!!!
People who have been blind from birth make use of the visual parts of their brain to refine their sensation of sound and touch, according to an international team of researchers led by neuroscientists at Georgetown University Medical Center.
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When a person has lost sight from birth, the visual part of the brain doesn't get to just chill -- it gets new duties. In a study led by Georgetown University Medical Center, we begin to see why the blind have heightened senses of touch and hearing.
ReplyDeleteScientists gave blind and sighted participants a series of tests involving sound and touch. Since sight wasn't tested, you might think that everyone was on a level playing field -- but never underestimate the power of the brain.
Using an fMRI, the researchers saw which parts of the brain lit up with activity as participants processed what they heard and felt. The visual cortex in the brains of the blind participants became strongly activated. Sighted volunteers didn't use the visual part much at all.
This seems to show that, in the blind, instead of the visual cortex analyzing what their eyes see, it analyzes what they hear and feel. Add that analysis to the usual auditory and tactile processing from the brain and the result is a more acute sense of touch and hearing.
The scientists are working to harness these super-senses to help blind people better navigate their world. One idea being tested is goggles that turn visual cues into auditory ones.
The brain -- in challenging times, smart enough to re-invent itself.