Which condition is characterized by the progressive loss of intellectual function across multiple domains?

• A. Cushing disease
• B. Hepatic encephalopathy
• C. Alzheimer’s disease
• D. Failure to thrive

Answer: (C)

The condition characterized by the progressive loss of intellectual function across multiple domains is Alzheimer's disease. This neurodegenerative disorder primarily affects cognitive functions, leading to a gradual decline in memory, reasoning, judgment, and other cognitive abilities. Alzheimer's disease typically begins with mild memory lapses and can progress to more severe symptoms, including difficulty with language, problem-solving, and ultimately, the ability to carry out everyday tasks.

In Alzheimer's, numerous domains of intellectual function are affected, particularly those related to memory and cognition. The presence of amyloid plaques and tau tangles in the brain is associated with the progression of the disease, leading to the deterioration of neural connections and, consequently, cognitive decline. The diagnosis is often made clinically, but can later be confirmed post-mortem through brain imaging or histopathological examination.

This understanding of Alzheimer's disease highlights its progressive nature and the multifaceted impact it has on intellectual function across various domains.