What are the Causes of Dementia:
Dementia describes a group of symptoms that affect memory, thinking, and social skills with enough severity to interfere with your daily life. It is not a specific disease, but several different diseases can cause dementia.
Although dementia generally involves memory loss, memory loss has different causes. Having memory loss alone does not mean you have dementia.
Alzheimer’s disease is the most common cause of progressive dementia in older adults, but there are several causes of dementia. Depending on the cause, some dementia symptoms may be reversible.
What are the Common Causes of Dementia:
Dementia is caused by damage or loss of nerve cells and their connections in the brain. Depending on the area of the brain affected by the damage, dementia can affect people differently and cause different symptoms.
Dementias are often grouped by what they have in common, such as protein or proteins deposited in the brain or the affected part of the brain. Some illnesses resemble dementias, such as those caused by a reaction to medications or vitamin deficiencies, and may improve with treatment.
What is the most common cause of dementia?
What is the most common cause of dementia? Alzheimer’s disease is the most common cause of dementia. Between 60% to 80% of people with dementia have Alzheimer’s.
What causes human dementia?
But, as well as progressive brain cell death, like that seen in Alzheimer’s disease, dementia can be caused by a head injury, a stroke, or a brain tumour, among other causes. This prevents normal blood flow, depriving brain cells of oxygen.
What can cause rapid-onset dementia?
Creutzfeldt-Jakob disease causes a type of dementia that gets worse unusually fast. More common causes of dementia, such as Alzheimer’s, Lewy body dementia and frontotemporal dementia, typically progress more slowly. … Sporadic Creutzfeldt-Jakob disease develops spontaneously for no known reason.
Types of dementias that progress and aren’t reversible include:
- Alzheimer’s Disease: Alzheimer’s disease is the most common cause of dementia.
- Although not all the causes of Alzheimer’s disease are known, experts do know that a small percentage is related to mutations in three genes, which can be passed from parent to child. While several different genes are likely involved in Alzheimer’s disease, an important gene that increases risk is apolipoprotein E4 (APOE).
- Alzheimer’s patients have plaques and knots in the brain. Plaques are clusters of a protein called beta-amyloid, and tangles are fibrous tangles made up of tau protein. These groups are believed to damage healthy neurons and the fibers that connect them.
- Other genetic factors may increase the chance that people will develop Alzheimer’s.
- Vascular dementia. This second most common type of dementia is caused by damage to the vessels that supply blood to your brain. Blood vessel problems can cause strokes or damage the brain in other ways, such as damaging the white matter fibers of the brain. The most common symptoms of vascular dementia include difficulty solving problems, slow thinking, focus, and organization. These tend to be more noticeable than memory loss.
- Lewy body dementia. Lewy bodies are abnormal groups of globe-shaped proteins that have been found in the brains of people with Lewy body dementia, Alzheimer’s disease, and Parkinson’s disease. This is one of the most common types of progressive dementia. Common signs and symptoms include depicting dreams in a dream, seeing things that don’t exist (visual hallucinations), and problems with concentration and attention. Other signs include slow or uncoordinated movements, tremors, and stiffness (parkinsonism).
- Frontotemporal dementia. This is a group of diseases characterized by the breakdown (degeneration) of nerve cells and their connections in the frontal and temporal lobes of the brain, the areas generally associated with personality, behavior, and language. Common symptoms affect behavior, personality, thinking, judgment, language, and movement.
- Mixed dementia Autopsy studies of the brains of people over 80 who had dementia indicate that many had a combination of several causes, including Alzheimer’s disease, vascular dementia, and Lewy body dementia. Studies are underway to determine how mixed dementia affects symptoms and treatments. Source MayuClinic.