sort and importantly there are a number of democrat dementias that are treatable due to vitamin defic ichlt eechlt niency treatable if they haven't gone too far down the line. >> it's my understanding that the only one on the list is not preventible you can't slow it down and there's no cure for alzheimer's. >> you're right. there's no treatment available today that can either prevent or halt the disease. that is what we must achieve. it's very important to realize that alzheimer's is not just sort of an inevitable byproduct of the natural aging process. it's a true, ferocious disease like aids or heart disease and must be tackled in the same manner. we needy affective medicines for these conditions that we currently do not have. >> dr. gallagher thompson, you know, you deal a lot with minority caregivers as well. what are some of the differences that you've observed? what are the different needs? >> well one big difference is really seeing this whole thing as part of normal aging for a long time, often until it gets to the point where there is significant behavior problems and that's when the family rea