Dementia is a set of symptoms caused by diseases that damage the brain. Understanding it changes how caregivers respond.
Definition
Progressive decline in memory, thinking, language and judgment severe enough to affect daily life; not normal aging.
Common causes
Alzheimer’s disease, vascular dementia, Lewy body dementia and frontotemporal dementia; mixed types are common.
What it is not
Delirium (sudden, often reversible confusion from illness or medication) and depression can mimic dementia and need medical evaluation.
Common mistake
Assuming all confusion in an older person is dementia. Sudden change means call the doctor.
Key Takeaways
- Progressive decline in memory, thinking, language and judgment severe enough to affect daily life; not normal aging.
- Alzheimer’s disease, vascular dementia, Lewy body dementia and frontotemporal dementia; mixed types are common.
- Delirium (sudden, often reversible confusion from illness or medication) and depression can mimic dementia and need medical evaluation.
Check Your Understanding
Before moving on, explain in your own words the most important point from “What Dementia Is and Is Not” and name one situation in your work or family where you would apply it, and who you would report to or ask if unsure.
Action Step
Write a one-paragraph explanation of dementia you could give to a family member who thinks it is just old age.
This course is educational only. It is not medical, nursing or legal advice, does not replace state-approved training programs, clinical supervision or employer policies, and does not issue any license, certification or credential. Scope of practice and training requirements vary by state; always follow the care plan, your supervisor’s direction and the current guidance of the licensed clinicians responsible for the person in your care.