, that really are psychiatric in nature, such as obsessive compulsive disorder, depression, and tourette's syndrome which say blend of movement and psychiatric disturbance. so i think the theme here is that we stimulate the motor circuit for movement disorders. we stimulate this emotional reward sdirt for treating these psychiatric disorders. and it seems to be more circuit specific than disease specific so we use the same targets, the same stimulation parameters for all of these conditions, granted that this is fairly large scale kind of stimulation. >> there is an interesting sociological point here, malion and that is that helen mayberg whom you had on this program recently introduced deep brain stimulation for depression. stimulating this area 25 that she found hyperactive. and here is a psychiatric illness that was treated successfully by a neurologist. and why is this so. why one psychiatrist doing this. and that is the cultural of the two fields are different. neurologists intrinsically from broker and vernica on have thought of anatomy, anatomy, anatomy, location, location, locatio