Which geriatric condition is characterized by normal alertness but progressive global deterioration of cognition in multiple domains?

Which geriatric condition is characterized by normal alertness but progressive global deterioration of cognition in multiple domains?

• A. Delirium
• B. Cognitive impairment
• C. Parkinson's disease
• D. Alzheimer's disease

Answer: (D)

Alzheimer's disease is a progressive neurodegenerative dementia where cognition declines across multiple domains while alertness (consciousness) remains intact in the early to middle stages. The typical picture starts with insidious memory loss and then spans language difficulties, problems with visuospatial skills, and impaired executive function, leading to growing difficulty with daily activities. This pattern—gradual, global cognitive deterioration over time with preserved alertness—distinguishes it from delirium, where consciousness and attention are acutely disturbed and fluctuate. While Parkinson’s disease can later involve cognitive problems, the early and prominent feature here is global decline across multiple cognitive areas with preserved wakefulness, rather than primary motor symptoms guiding the diagnosis. Cognitive impairment is a broader term, but the description points to a dementing process that progressively affects multiple cognitive domains, most classic for Alzheimer's disease.

Alzheimer's disease is a progressive neurodegenerative dementia where cognition declines across multiple domains while alertness (consciousness) remains intact in the early to middle stages. The typical picture starts with insidious memory loss and then spans language difficulties, problems with visuospatial skills, and impaired executive function, leading to growing difficulty with daily activities. This pattern—gradual, global cognitive deterioration over time with preserved alertness—distinguishes it from delirium, where consciousness and attention are acutely disturbed and fluctuate. While Parkinson’s disease can later involve cognitive problems, the early and prominent feature here is global decline across multiple cognitive areas with preserved wakefulness, rather than primary motor symptoms guiding the diagnosis. Cognitive impairment is a broader term, but the description points to a dementing process that progressively affects multiple cognitive domains, most classic for Alzheimer's disease.