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.

Here are some of the ways wildfire smoke particles or the inflammatory signals they cause could reach the brain and what researchers found in the sperm of animals exposed to wildfire smoke.

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.

Using a technique called admixture mapping, researchers can leverage the diversity of people with mixed ancestry to look for hard-to-find genetic risk factors for diseases like Alzheimer's disease.