dr. dylan edward system heading up the -- edwards is heading up the study. >> we think this is going to have more impact. >> the study is blind meaning some patients get tdcs and others get a placebo, a sham simulation. >> do you feel there was a significant difference before the trial and after? >> yes. it was a distinct difference in the sensation and use of my arm. >> really? the team uses another type of brain stimulation called transcranial magnetic stimulation. it is powered by a magnetic coil and used by the toam -- team to measure the brain after tdcs. >> we will register your brain to the motion capture. >> it's quite a get up. all >> nice and relaxed. [laughing] great. >> how weird. it feels like you are flicking me in the head. >> i would like to you do a small muscle contraction. >> we are trying to send a lot of information to your brain. don't get scare federal your hand twitch, okay? >> okay. oh yeah. that's the first time i felt it. >> the single pulse of magnetism. the shock is only 100 micro seconds or so. it causes activity in the brain that goes all the way down to muscle