Definition of Alzheimer's. 1  Alzheimer's disease is a progressive, degenerative disorder that attacks the brain's nerve cells, or neurons, resulting in loss of memory, thinking and language skills, and behavioral changes. Origin of the term Alzheimer's disease dates back to 1906 when Dr. Alois Alzheimer, a German physician, presented a case history before a medical meeting of a 51-year-old woman who suffered from a rare brain disorder. 2  A brain autopsy identified the plaques and tangles that today characterize Alzheimer's disease.
Since the release of the first novel, Harry Potter and the Philosopher's Stone, on 30 June 1997, the books have gained immense popularity, critical acclaim and commercial success worldwide.
Harry Potter and the Prisoner of Azkaban is the third book of series. Book published on 1999. Book is mostly about Harry and his friends travel to Hogsmeade. Harry Potter and the Goblet of Fire published on 2000. Book is mostly about Potterâs entrance to Triwizard Tournament. There are also Harry Potter and the Order of the Phoenix, Harry Potter and the Half-Blood Prince and Harry Potter and the Deathly Hallows books of series.