It’s understandable to be nervous about dementia if you or someone you love is suddenly forgetting important names and dates.

Some people are immune to dementia, even if their brain is deteriorating. Cognitive reserve is the secret boost that builds ...

And those who experienced peak activity later in the afternoon — from 2:15 p.m. onward — had a 45% higher risk of dementia ...

Readers respond to an essay by Patti Davis on caring for family members with dementia. Also: New math on a wealth tax; how ...