Which neurodegenerative disorder is described as a fatal disease with progressive memory loss, and is associated with acetylcholine deficiency?

• A. Parkinson's Disease
• B. Lewy Body Dementia
• C. Frontotemporal Dementia
• D. Alzheimer's Disease

Answer: (D)

Recognizing Alzheimer's disease as a fatal neurodegenerative disorder characterized by progressive memory loss and a deficiency of acetylcholine in memory-related brain regions.

In Alzheimer's, there is a gradual breakdown of neurons that use acetylcholine, especially in areas like the basal forebrain and cortex, leading to reduced cholinergic transmission. This acetylcholine deficiency helps explain why memory and learning become increasingly impaired as the disease progresses. Treatments often include acetylcholinesterase inhibitors to boost acetylcholine levels and temporarily improve symptoms, which further supports this underlying mechanism. As the disease advances, widespread brain changes—such as amyloid plaques and tau tangles—drive widespread cognitive decline, ultimately contributing to the fatal course.

Among the other conditions listed, Parkinson's disease centers on motor symptoms from dopaminergic loss; Lewy body dementia combines parkinsonian features with fluctuating cognition and visual hallucinations; and frontotemporal dementia typically shows early changes in personality, behavior, or language rather than prominent early memory loss. Thus, the description best fits Alzheimer's disease.