Human brain's 'bat sight' found
The part of the brain used by people who can "see like a bat" has been identified by researchers in Canada.
From the BBC website - full article can be found here.
Some blind people have learned to echolocate by making clicking noises and listening to the returning echoes. A study of two such people, published in PLoS ONE, showed a part of the brain usually associated with sight was activated when listening to echoes. Researchers looked at two patients who use echolocation every day. EB, aged 43, was blinded at age 13 months. LB, 27, had been blind since age 14. They were recorded echolocating, while microphones were attached to their ears. The recordings were then played while their brain activity was being recorded in an fMRI machine. Increased activity in the calcarine cortex was discovered.
Susie Roberts, rehabilitation officer at Action for Blind People, said: "This research into brain activity and echolocation is very interesting and improves our understanding of how some visually impaired people may be processing information to help them navigate safely.