The number of patients with dementia is rising in proportion to the aging of our population; therefore, by 2050 the prevalence of Alzheimer's disease is expected to triple, risking the integrity of the entire U.S. healthcare economy. More NIH dollars are spent on Alzheimer's disease research than on any other neurological disease and our available fund of information has commensurately accelerated. Whereas 30 years ago little distinction was made between different forms of dementia, clinicians now distinguish multiple degenerative and vascular syndromes, each with their own etiologic,...