What causes dementia and alzheimer's?

Amyloid... Alzheimer's and some other dementias are related to buildup of beta amyloid plaques in the brain. Genetics often play a role as well.
Nobody knows. In most cases, it is not clear what are the causes of alzheimer's disease. In some cases, the cause is an abnormal gene but that is true in only about 5% of people with alzheimer's disease.

Related Questions

Can a high INR cause symptoms of dementia or alzheimers?

Inr. A high inr in of itself doesn't cause dementia or Alzheimer's disease. Whether it's due to taking anticoagulant like warfarin or because of liver disease, an elevated inr increases the tendency for bleeding,however. Read more...

What type of drugs cause dementia or alzheimers?

Pseudo dementia . Drugs do not cause alzheimer's, but numerous medicines can make it far worse due to anti-cholinergic side effects, and many elderly pts can seem to be demented due to drug effects, which reverse when med is modified. Read more...
Alcohol. We have no evidence alzheimer's is caused by a drug. However chronic excessive alcohol use is associated with dementia. There are negative cognitive effects of many other drugs including marijuana and opiates but few dementia syndromes described. To cause dementia there would need to be brain damage. Read more...
There are many. Agents that can contribute to cognitive decline although none are known to specificallly cause alzheimer's disease. In general it is best to avoid what are known as anti-cholinergic agents in the elderly since these can cause side effects including cognitive worsening. Read more...

Can alzheimer's or dementia cause weight loss?

Yes. Alzheimer's and parkinson's diseases both cause loss of olfactory perception leading to loss of sense of smell. Since enjoyment of food is very dependent on smell our food, people with dementia often lose their appetite because food doesn't smell appetizing. Adding aromatic spices like cinnamon, nutmeg, or even hot sauce can help make food interesting again. Good luck! Read more...

Alzheimers disease, dementia, poor memory, mci -- what causes do they have in common?

Memory deficits. There is a chemical in the brain called acetylcholine which is deficient with aging, and that causes deficits in cognitive functions. Read more...
Not known. Alzheimer's disease is only one cause of dementia and there are other causes of memory problem. Some are reversible (e.g., vitamin B12 deficiency) so it is important to exclude them by medical examination. Mci may be a mild form of alzheimer's disease. Read more...

Is memory loss from dementia caused by multiple mini strokes different from the type caused by alzheimer's? In what way?

Yes & no. Memory loss is memory loss, no matter how you lose it. However, it also depends upon what memory is lost. Vascular dementia or memory loss from many strokes is described as step-wise in progression. It might be possible to slow down by optimize risk factors. Alzheimer's disease is a slow inexorable slide or loss of memory once it begins altho we can try to minimize initial risk via exercise & food. Read more...
Pattern different. "vascular dementia" is associated with heart disease, hypertension, high cholesterol, is rather abrupt, stepwise, and associated with some focal outcomes. The cognitive exam is perhaps similar to alzheimer;s, but abrupt changes not seen in alzheimer's. Read more...

Is it possible that Alzheimer's and many other dementias are a prion disease since the real cause has never been determined?

Yes. Researchers are already discussing this. The term prion just means that protein misfolding self-perpetuates. It is not an actual disease itself but more if a descriptive term. Read more...

Is risperdal. 5 mg dose safe for an elder patient with alzheimer's and vascular dementia? I read this drug can cause sudden death in elder patients.

No. According to all studies so far, any antipsychotic used for the purpose of treating behavioral problems or psychosis related to dementia is associated with earlier stroke-related death. This occurs regardless of the antipsychotic and the dose. There are some studies that have shown some antipsychotics to be safer than others (like quetiapine) but those studies are small and inconclusive. Read more...
Depends . Every decision about using a medication depends on the specific risks and benefits of the particular patient. Symptoms are already occurring and may have minor or major risks to life, health and quality of life. Side effects are possible though not definite. Discuss your questions with the prescribing doctor to better understand this specific situation. Read more...