"I can hear a building over there": Researchers study blind people's ability to echolocate - Polidicks

[img]http://dl.dropbox.com/u/6226565/aperture/news.png[/img] [release] [b] It is common knowledge that bats and dolphins echolocate, emitting bursts of sounds and then listening to the echoes that bounce back to detect objects. What is less well-known is that people can echolocate too. In fact, there are blind people who have learned to make clicks with their mouths and to use the returning echoes from those clicks to sense their surroundings. Some of these individuals are so adept at echolocation that they can use this skill to navigate unknown environments, and participate in activities such as mountain biking and basketball. [/b] Researchers at The University of Western Ontario's Centre for Brain and Mind (London, Ontario, Canada) have recently shown that blind echolocation experts use what is normally the 'visual' part of their brain to process the clicks and echoes. The study, appearing this month in the scientific journal PLoS ONE, is the first to investigate the neural basis of natural human echolocation. Senior author Mel Goodale, Canada Research Chair in Visual Neuroscience, and Director of the Centre for Brain and Mind, says, "It is clear echolocation enables blind people to do things otherwise thought to be impossible without vision and can provide blind and visually-impaired people with a high degree of independence." Goodale and his team of researchers first made recordings of the clicks and their very faint echoes using tiny microphones in the ears of the blind echolocators as they stood outside and tried to identify different objects such as a car, a flag pole, and a tree. The researchers then played the recorded sounds back to the echolocators while their brain activity was being measured in Western's state-of-the-art 3T functional magnetic resonance imaging (fMRI) brain scanner. Remarkably, when the echolocation recordings were played back to the blind experts, not only did they perceive the objects based on the echoes, but they also showed activity in those areas of their brain that normally process visual information in sighted people. Most interestingly, the brain areas that process auditory information were no more activated by sound recordings of outdoor scenes containing echoes than they were by sound recordings of outdoor scenes with the echoes removed. When the same experiment was carried out with sighted control people who did not echolocate, these individuals could not perceive the objects, and neither did their brain show any echo-related activity, suggesting visual brain areas play an important role for echolocation in blind people. According to Goodale, this research will provide a deeper understanding of brain function, particularly how the senses are processed and what happens neurologically when one sense is lost. [/release] [url=http://medicalxpress.com/news/2011-05-i-can-hear-a-building.html]Source[/url]

Playing baseball with nothing but tongue clicks to see? Thats pretty damn impressive.

That's pretty damn neat.

ohohoh, why cant i hold all these glados profile pictures? on another note, echolocation... uh, isn't that what Daredevil and bats use?

i can echolocate already.

Blind people who can hone in their ability to hear this much, must really shit bricks if a gun were to go off. Talk about an ear-piercing surprise. [b]END OF THE WORLD END OF THE WORLD END OF THE WORLD[/b]

I saw some show where a blind guy showed off his amazing echo location skills. He could tell the shape of a car, the inlets of an apartment building and even [i]ride a bike[/i] just by clicking his tounge.

bl1nd proph3ts

[QUOTE=Janus Vesta;30058517]I saw some show where a blind guy showed off his amazing echo location skills. He could tell the shape of a car, the inlets of an apartment building and even [i]ride a bike[/i] just by clicking his tounge.[/QUOTE] I've seen that too. I think it's this kid: [url]http://www.youtube.com/watch?v=YBv79LKfMt4[/url]

Well that's absolutely amazing. Kudos to them.

If anyone's curious, the full documentary: [media]http://www.youtube.com/watch?v=qLziFMF4DHA[/media] [media]http://www.youtube.com/watch?v=G1QaCeosUmw[/media] [media]http://www.youtube.com/watch?v=ikpNZOx5FGk[/media] [media]http://www.youtube.com/watch?v=3Px-aPnk4ZU[/media] [media]http://www.youtube.com/watch?v=MNkJ1diTxOE[/media]

Daredevil is one of the best comic book characters. THIS SHIT IS REAL.

[QUOTE=camacazie638;30058421]Blind people who can hone in their ability to hear this much, must really shit bricks if a gun were to go off. Talk about an ear-piercing surprise. [b]END OF THE WORLD END OF THE WORLD END OF THE WORLD[/b][/QUOTE] Thinking about it if they're accurate the'd make good spotters.

i think its apparent that the parts of the brain that deal with the eyes aren't just taking in information from the eyes, they are the parts of the brain that "visualize". my hypothesis is that this part of the brain is what allows us to solve the traveling salesman problem so easily compared to to even the worlds most powerful supercomputers.