dr. george pratt. make of that study about the obesity study at west virginia. >> i think it's very interesting. and psychiatry and neurosurgeons are starting to work together again and planting these electrodes in the brainution imaging for things like resistant depression. for obsessive compulsive disorder and now for people who are morbidly obese. it's exciting, and going to be much better than the psycho surgery, you know in the 1940s and '50s. >> what do you think, kara? >> i think it's really interesting. and i think we're probably the research is limited is the problem of knowing why certain people eat or certain people abuse drugs. we like to put them all under an umbrella of, there's something wrong with their dopamine system or these people specifically don't get enough neurotransmitter that tells them they're full or their stomach is not telling them the right signals. but, you know, everybody's pathology is very different. and until i think that we can accurately diagnose why people have th