What condition is characterized by a decline in cognitive ability that disrupts daily functioning?

Dementia is a condition marked by a significant decline in cognitive abilities, including memory, reasoning, and communication skills, which particularly affects a person's daily functioning and quality of life. It encompasses various diseases, including Alzheimer's Disease, which is a specific type of dementia. Individuals with dementia often struggle to perform everyday tasks, maintain social relationships, and manage daily activities due to impairments in their cognitive capabilities.

In contrast, while Alzheimer's Disease refers specifically to a progressive neurodegenerative disease that is the most common form of dementia, it does not define the broader category of cognitive decline associated with various conditions. Amnesia primarily involves memory loss and does not necessarily affect all areas of cognitive function or daily activities. Mood disorders can impact cognitive function and daily life but are characterized primarily by emotional disturbances rather than a significant decline in overall cognitive abilities. Therefore, dementia is the most accurate term to describe a decline in cognitive ability that disrupts daily functioning.