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Stroll virtual world without moving a finger

by Staff Writers
Tokyo (AFP) Oct 12, 2007
Japanese researchers say they have found a way to let people stroll through the virtual world of Second Life using their own imagination, in a development that could help paralysis patients.

Previous studies have shown people can move computer cursors through brain waves, but the Japanese team says it is the first to apply the technology to an Internet virtual world.

The technology "would enable people suffering paralysis to communicate with others or do business through chatting and shopping in a virtual world," said Junichi Ushiba, associate professor at Keio Univesity's rehabilitation centre.

Second Life is an increasingly popular virtual world in which people -- and animals -- are represented by animated avatars and can do everything from social activities to shopping.

Ushiba said Second Life could motivate patients with severe paralysis, who are often too depressed to undergo rehabilitation.

"If they can see with their own eyes their characters moving around, it could reinvigorate their brain activity and restore some functions," he said.

Under the technology, a person wearing head gear embedded with electrodes, which analyse brain waves in the cerebral motor cortex, would be able to move a Second Life character forward by thinking he or she is walking.

Imagining movement with the right or left hand would make the character turn accordingly in the same direction.

Researchers have previously put similar technology to work to scan brain waves to control objects such as computer cursors and electrical gears.

In the Keio University laboratory, the team has designed artificial arms that operate by reading brain waves, although none is known to be commercially available yet.

Ushiba said the technology could help people undergoing neuro-rehabilitation by stimulating brain activity.

Traditionally, "if a stroke leaves a man's right hand paralysed, he has been encouraged to use his left hand instead," Ushiba said.

"More recently, however, it has come to light that the paralysed hand would start moving better if you try to use it," Ushiba said, noting that attempts to use a numb hand increase brain activity.

The team next plans to test the technology on actual paralysis patients to see how they respond to the virtual world.

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Researchers Develop Tool For Clearer Ultrasound Images
Charlottesville, VA (SPX) Jul 18, 2007
University of Virginia Engineering School Associate Professor William F. Walker and Research Associate Francesco Viola have developed a new tool - an advanced imaging algorithm - that is, quite literally, transforming the way we see things. Together with graduate student Michael A. Ellis, biomedical engineering team has created an innovative method of signal processing that can be used with a broad range of imaging and sensing systems including ultrasound, RADAR, SONAR, telecommunications, and even a few optical imaging systems.







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