Certified Nursing Assistant (CNA) Practice Exam

Which are the two most common types of dementia?

1. Vascular dementia and Parkinson's disease

2. Alzheimer's and cardiovascular disease

3. Frontotemporal dementia and Multiple sclerosis

4. Alzheimer's and vascular dementia

The correct answer is: Alzheimer's and vascular dementia

The two most common types of dementia are Alzheimer's disease and vascular dementia. Alzheimer's disease is the most prevalent form of dementia, characterized by a gradual decline in cognitive functions, such as memory, thinking, and reasoning. It is linked to the buildup of proteins in the brain, leading to the death of brain cells. Vascular dementia, the second most common type, occurs due to reduced blood flow to the brain, usually following a stroke or a series of mini-strokes. This lack of blood flow damages brain cells and impairs cognitive function. Together, Alzheimer's and vascular dementia represent the majority of dementia cases, making this combination the correct answer. In contrast, the other choices include conditions that are either not types of dementia or are less commonly associated with cognitive decline as primary symptoms, which makes them incorrect in this context.