Footnote

a AD is named after Alois Alzheimer, a German physician who first described the disease in 1906 after doing an autopsy on a patient who had suffered from severe dementia. AD is thought to account for more than 60 percent of dementia cases, affecting up to 1 in 10 people over 65 years of age. Another dementia, multi-infarct dementia, is caused by ministrokes, which damage the brain.