That estimate is based on a new study that found a higher lifetime risk than previously thought: After age 55, people have up to a 4 in 10 chance of eventually developing dementia—if they live long ...

[15] Naming is typically impaired in dementia, and the types of errors can be informative. Phonemic or semantic errors can be observed and suggest nonfluent or fluent progressive aphasia ...

Other types include vascular dementia when heart disease or small strokes ... they found the risk changes with the decades.Only 4% of people developed dementia between the ages of 55 and 75 ...

Up to 4 in 10 People Could Develop Dementia ... to it can begin two decades before symptoms appear. Other types include vascular dementia, when heart disease or small strokes impair blood flow ...