What is the most common form of dementia?

What is the most common form of dementia?

• A. Vascular dementia
• B. Alzheimer's disease
• C. Lewy body dementia
• D. Frontotemporal dementia

Answer: (B)

In dementia, one form far outweighs the others in how often it occurs. Alzheimer's disease is the most common cause of dementia, accounting for the majority of cases in many populations (often around 60–80%, depending on age and setting). This form typically begins with gradual memory loss and cognitive decline due to the buildup of amyloid plaques and tau tangles in the brain, especially affecting memory and later other domains. The other types have distinct features but are less common overall. Vascular dementia arises from cerebrovascular disease and often shows a stepwise decline; Lewy body dementia includes cognitive fluctuations with visual hallucinations and parkinsonian symptoms; frontotemporal dementia presents earlier with behavioral or language changes rather than prominent early memory loss. That combination of prevalence and the typical early presentation makes Alzheimer's disease the best answer.

In dementia, one form far outweighs the others in how often it occurs. Alzheimer's disease is the most common cause of dementia, accounting for the majority of cases in many populations (often around 60–80%, depending on age and setting). This form typically begins with gradual memory loss and cognitive decline due to the buildup of amyloid plaques and tau tangles in the brain, especially affecting memory and later other domains.

The other types have distinct features but are less common overall. Vascular dementia arises from cerebrovascular disease and often shows a stepwise decline; Lewy body dementia includes cognitive fluctuations with visual hallucinations and parkinsonian symptoms; frontotemporal dementia presents earlier with behavioral or language changes rather than prominent early memory loss. That combination of prevalence and the typical early presentation makes Alzheimer's disease the best answer.