Alzheimer's Disease Alzheimer's disease is a progressive degenerative disease of the brain. It is first described by the German neuropathologist Alois Alzheimer (1864-1915) in 1905. This disease worsens with advancing age, although there is no evidence that it is cause by the aging process. The average life expectancy of a person with the disease is between five and ten years, but some patients today can live up to 15 years due to improvements in care and medical treatments. The cause of Alzheimer's has not been discovered yet and it cannot be possible to confirm a person has Alzheimer's until their autopsy following death. How does Alzheimer's develop