Which cognitive decline disorder is known for impacting daily living activities significantly?

Dementia is a cognitive decline disorder that significantly impacts daily living activities due to its effects on memory, thinking, and behavior. Individuals with dementia may struggle with routine tasks that were once manageable, such as preparing meals, managing finances, or even personal care. The progressive nature of dementia affects cognitive functions, including reasoning, problem-solving, and communication abilities, leading to increased dependence on caregivers and support systems.

In contrast, senescence refers to the gradual process of aging and does not inherently imply cognitive decline or impact daily activities as significantly as dementia. Gerontology is the study of aging and the challenges associated with it, rather than a cognitive disorder itself. Ageism refers to prejudice against individuals based on their age and is not a disorder, but rather a societal issue that does not directly affect cognitive functioning in the way dementia does.