In general, Alzheimer’s disease symptoms worsen over time. The pace on which the disease progress, however, can vary widely between person to person. On the physical level, The changes in the brain cells proceed external symptoms, and may begin many years before any external signs show. This period is usually referred to as the “preclinical Alzheimer’s disease”.
The different stages of Alzheimer, described below show how different abilities are impacted once the brain damage is severe enough to start having external indications: