| TYPES OF DEMENTIA AND SOME CAUSES
· Alzheimer’s disease: The most common form of dementia, caused by the buildup of amyloid plaques and tau tangles in the brain. It typically begins with memory problems and progresses to affect thinking, language, and behavior.
· Vascular dementia: The second most common type, resulting from damage to blood vessels in the brain, often from strokes or chronic atherosclerosis. Symptoms can include problems with planning, judgment, and concentration, and may have a step-like progression following specific events.
· Dementia with Lewy bodies (LBD): Caused by abnormal protein deposits called Lewy bodies in the brain’s nerve cells. Common symptoms include visual hallucinations, fluctuating attention, and movement difficulties similar to Parkinson’s disease.
· Frontotemporal dementia (FTD): A group of disorders caused by damage to the frontal and temporal lobes of the brain. It most commonly leads to changes in personality, behavior, or language skills, and often occurs at an earlier age (45 to 64) than other forms of dementia.
· Mixed dementia: Occurs when a person has brain changes consistent with more than one type of dementia. The most common combination is Alzheimer’s disease and vascular dementia.
(Did You Know? Actor Bruce Willis has frontotemporal dementia.)
Rare types of dementia:
· Creutzfeldt-Jakob disease (CJD): A rare and rapidly progressing brain disease caused by abnormal proteins called prions.
· Huntington’s disease: A hereditary disease that causes a breakdown of nerve cells in the brain. Symptoms include involuntary movements, as well as cognitive and psychiatric problems.
· Normal pressure hydrocephalus (NPH): A build-up of cerebrospinal fluid in the brain that can sometimes be reversed with surgery.
· Posterior cortical atrophy (PCA): A rarer form of dementia where changes occur in the back of the brain, affecting vision and spatial skills.
· Wernicke-Korsakoff syndrome: A brain disorder caused by a severe deficiency of vitamin B1, often linked to chronic alcohol use.
Secondary and reversible causes:
In some cases, dementia-like symptoms can be caused by other medical conditions. The cognitive decline may be secondary to another illness or, in some situations, reversible with treatment. Examples include:
· Head injuries: Chronic traumatic encephalopathy (CTE) is associated with repeated head trauma.
· Vitamin deficiencies: Lack of certain vitamins, particularly B1, can cause dementia-like symptoms.
· Infections: Conditions such as HIV, bacterial meningitis, or Lyme disease can sometimes lead to dementia.
· Medication side effects: Some prescription medications can cause cognitive impairment.
-Gemini, AARP Magazine |
