Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: One useful application of PET scanning is in the diagnosis of Alzheimer's disease. This debilitating condition associated with memory loss primarily occurs in elderly individuals. A protein known as beta-amyloid gradually forms deposits, or plaques, in the brain. Severe memory loss and impaired movement appear to be direct results of the plaque growth. Answer: elderly
A:
Alzheimers disease is associated with memory loss in what group of people?