[quote]The operation involved rewiring some of Garthwaite's nerves so that nerve fibres that once controlled his arm and hand movements instead [b]hooked up to his chest muscles.[/b] Electrodes placed on his chest pick up the muscle movements and convert them into signals that direct the prosthetic limb.[/quote] It's not truly thought controlled, it's more of a puppet. A truly mind controlled one would either take directions, or use the nerves from the lost limb. Still cool, but this is very old news in the medical community.