Media playback is unsupported on your device

Thought-controlled devices a step closer

17 February 2011 Last updated at 18:55 GMT

Researchers are developing artificial limbs, wheelchairs and computers which can be controlled by the user's thoughts.

The devices, being shown off at a US science conference, include a prosthetic arm. Its developer says it gives patients almost as much control as a normal hand.

Pallab Ghosh reports from Washington.