Abstract
The prevalence of brain disorders affecting cognition (such as stroke and dementia) increases steadily in a linear fashion as age increases. Alzheimer's disease (AD) is the most frequent cause of dementia, increasing in prevalence from less than 1% below the age of 60 years to more than 40% above 85 years old. Worldwide, 35.6 million people have either Alzheimer's or dementia, according t…