chairman of the department of neurosurgery at west virginia university. what have we discovered? explain what this bbs is, doctor. >> well, this is inserting electrodes deep in the brain in the hypo thalamus, the part that controls our appetite. 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