Alzheimer's is a brain disease that causes problems with memory, thinking and behavior. It is the most common form of dementia and is not a normal part of aging. The majority of Alzheimer's patients are 65 and older. Alzheimer's worsens over time and has no current cure, but treatments for symptoms are available and research continues.
Dementia is the label used to describe a progressive decline in thinking and behavior. There are a number of different causes for dementia and while there are no known cures, there are a number of medications, exercises and lifestyle choices that can delay the onset or slow down the progression of some types of dementia.
The Alzheimer's Association is a great source for information
There are organizations that take care of Alzheimer/Dementia patients at home, making it more comfortable and familiar for the patient.