Learn about the definition for this nursing term.
definition
Degenerative and irreversible condition of the brain, with an unknown cause. It is the most common form of dementia, typically starting at age 65 or older, although early-onset Alzheimer's does occur. Initially, the person has short-term memory loss. As the disease progresses, there is increasing confusion, accompanied by the loss of long-term memory, language, and body functions. There is no cure.