Blood levels of a substance that's predictive of Alzheimer's disease onset rose during cardiac surgery and remained elevated afterwards, a new study finds.

A new study in older adults shows people who slept too much or too little experienced greater cognitive decline than those who slept a moderate amount.

Neighborhoods with opportunities for socialization, physical activity, and intellectual stimulation may help preserve older adults' cognitive health.

A new method can estimate when a person with no cognitive symptoms will start showing signs of Alzheimer's dementia based on a brain scan and age.

Pleasant socializing on one day results in better cognitive performance the next, finds new research with people 70 to 90 years old.

Just having someone who'll listen to you when you need to talk could be a buffer against the effects of age and disease on brain health.

A small increase in levels of fine particle pollution at specific addresses was linked with a greater dementia risk for people living there.

The FDA has approved an expensive drug for Alzheimer's disease called aducanumab, but does it work? And who should pay for it? An expert weighs in.

Researchers have identified potential new treatment targets for Alzheimer's disease and several FDA-approved drugs with therapeutic potential against them.

Tooth loss is a risk factor for dementia—and with each tooth lost, the risk of cognitive decline grows. But dentures may offer some protection.