dress the monkey with the exoskeleton and the monkey learns to walk according to what is seen on the screen. >> once the monkey is trained to think about these walking movements, we can actually have the monkey control this exoskeleton using its thoughts alone without actually moving its legs. >> wu but we have to build a human device that we are in the process of doing. we also have to basically get the best possible brain-derived signal to control this exoskeleton. now we are in a race you know, we are in an 18-month race to try to get a demonstration going. >> how good is the brain machine interface going to quiget over next several years? >> it's going to depend on how many cells we can record simultaneously. if we can get to 50,000, 40, 50,000 simultaneously, we're going to see a big shift. we want to have a full body