Which statement best describes dementia?

• A. A rapid reversible condition
• B. A normal aging process with no impact on function
• C. A slowly progressive decline in mental abilities, including memory, thinking, and judgment, often with personality changes
• D. A transient confusion due to dehydration

Answer: (C)

Dementia is a chronic, progressive decline in cognitive function that interferes with daily life. The description that emphasizes a slow, ongoing deterioration in memory, thinking, and judgment, often with personality changes, best captures what dementia looks like as it develops and progresses. This onset is gradual and persists over months to years, unlike conditions that come on quickly and can be reversed.

It’s not a rapid reversible condition like delirium, and it’s not simply normal aging, which should not severely impair daily functioning. Nor is it just transient confusion from dehydration, which is another example of delirium. Dementia involves multiple cognitive domains and functional impact, with the possibility of personality changes as it advances.