Alzheimer's-related brain changes occur 2 decades before symptom onset

Alzheimer’s disease is the most common form of dementia, accounting for around 60-80% of all cases. Around 5.3 million people in the US have Alzheimer’s, of whom 5.1 million are aged 65 and older.

Researchers know Alzheimer’s development is related to death of brain cells, or neurons, which leads to the memory loss and behavioral changes that are associated with the disease. Read more.