On the other hand, divorcees are about twice as likely as married people to develop dementia, the study indicates.

"...this is another instance where you're seeing that staying physically active affects your overall health and your cognitive health."

Treating high blood pressure more aggressively than current standards suggest could lead to a lower risk of dementia, researchers say.

Researchers have found a link between playing football and white matter injury in the brain, which might contribute to dementia in people with CTE.

New research links chronic mid-life stress, though not trauma, with memory decline in women. That link did not appear for men.

"There is no Goldilocks decade during which you can say, 'This is when I get my chance to short sleep.'"

Difficulty managing money can be an early sign of dementia, research suggests, and even correlate with plaques in the brain.

Detecting some kinds of dementia early could mean slowing down neuron damage before it's too late.

Though older Americans say they're scared of developing dementia, many haven't brought it up with their doctor, a survey finds.

"Doing this study helped me look at my life, not as a big neon sign that says, 'DEMENTIA' in front of me…"