[caption id="attachment_47211" align="alignleft" width="150" caption="Electrical signals emitted by the brain can be decoded by computers."][/caption]

Swiss scientists have demonstrated how a partially paralyzed person can control a robot by thought alone, a step they hope will one day allow immobile people to interact with their surroundings through so-called avatars.

Similar experiments have taken place in the United States and Germany, but they involved either able-bodied patients or invasive brain implants.

On Tuesday, a team at Switzerland's Federal Institute of Technology in Lausanne used only a simple head cap to record the brain signals of Mark-Andre...

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