Alzheimer's disease is the most common form of dementia. It is a neurological disease of the brain that progressively worsens as a person passes through its seven stages. At this time there is no cure, and the disease's effects are not reversible.

Stage 1

There are no signs or symptoms of Alzheimer's disease or dementia.

Stage 2

A mild decline in mental function is noted, which could be the result of normal aging or an early sign of Alzheimer's disease. Infrequent memory losses, such as misplacing an object or forgetting common names and terms, may be noted. According to Medical News Today, "50 percent of people aged 65 and over start experiencing slight difficulties with recalling the occasional word and concentration."

Stage 3

Alzheimer's disease may sometimes be diagnosed at this stage. A person may have problems with memory, organization, moodiness and anxiety, and many times will attempt to hide the dysfunction from friends and family.

Stage 4

At this stage, it becomes easier to confirm Alzheimer's disease. A person can still identify family and close friends but lacks much personal memory and will withdraw socially. Driving, cooking, housework, reading and shopping become problematic. Problems are usually denied by the individual.

Stage 5

A moderately severe decline is noted. Requiring day-to-day living assistance, a person cannot recall simple details such as telephone number, address and current date. He will probably need help dressing. However, the individual can still eat and use the restroom unaided.

Stages 6 and 7

During this period of severe decline, there is a major change in personality, and the individual requires constant care. She will recognize family members but probably can't recall their names, and may wander off and become lost. In the final stage of Alzheimer's disease, a person cannot speak or control body movement. The body continues to fail as health deteriorates, and sufferers are generally bedridden.

Source:

Alzheimer's Association

Mayo Clinic

Alzheimer's Foundation of America