Free range DNA fragments from a simple blood draw may be signs of higher risk of frailty and dementia, a new study shows.

Older adults who sit for long periods of time just watching TV may have an increased risk of dementia, even if they are otherwise physically active.

World Trade Center responders who have PTSD may have a new, specific form of dementia, a new study suggests.

"Hearing loss is one of the biggest predictors of dementia in people.... This study indicates that the same connection is at work in aging dogs."

Music can tap into the memories of people with Alzheimer's disease and offer a boost to their caregivers, as well.

A rapid decline in sense of smell during a period of normal cognition predicted multiple features of Alzheimer's disease, report researchers.

A new study highlights the importance of muscle mass as an independent factor linked with rapid cognitive decline in older adults.

"Seizures are a common complication of stroke. Screening and treating stroke survivors for them may reduce the onset of dementia."

Older people with an underactive thyroid may have more risk of developing dementia.

Living in an area lush with green space may boost cognitive function, slow mental decline, and reduce depression for middle-aged women.