With the dramatic increase in life expectancy among people with Down syndrome over recent decades, it has been observed they develop Alzheimer’s disease at a much younger age and at a much higher incidence than the general population. Our guest, an expert on brain imaging and neurodegeneration, discusses the theories behind this relationship and the similarities and differences in how Alzheimer's disease progresses in the Down syndrome and general populations. Guest: Dr. Brad Christian, professor of medical physics and psychiatry at the University of Wisconsin