. >> well, this is inserting electrodes deep in the brain in the hypo thalamus, the part that controls. our neurosurgeons have really spearheaded this fda approved study to see if this would possibly have some benefit for patients with morebid obesity. that their life expectancy will be affected. >> larry: how does it work? >> well, it works by electrodes being placed on both sides of the brain, into the hypothalamus, one into the part that is the center that makes you feel full. the other is the appetite center where your drive to eating is. so these electrodes have contacts on them that go through these areas. and then a pacemaker type generator is inserted under the skin, and from that, we're able to change the settings, and try to see if we can affect the appetite drive these patients have. >> larry: what have you learned so far? >> well, we've learned in the first few series, the first series we've done, that the procedure can be done safely. we've learned that we don't think we're having side effects. and that we can affect the urge to eat, decrease the urge. we're looking at it