Alzheimer's disease (AD) is a neurodegenerative disease and is the most common form of dementia accounting for around 60–70% of cases. The most common early symptom is difficulty in remembering recent events. As the disease advances, symptoms can include problems with language, disorientation, mood swings, loss of motivation, self-neglect, and behavioral issues. As a person's condition declines, they often withdraw from family and society. Gradually, bodily functions are lost, ultimately leading to death. Although the speed of progression can vary, the average life expectancy following diagnosis is three to twelve years.
Chris Hemsworth has told Sky News that finding out he had a greater chance of developing Alzheimer's disease was a "gear shift" in..