Is memory loss a normal part of aging?

Is memory loss a normal part of aging?

Gus Alva (Medical Director, ATP Clinical Research) gives expert video advice on: What is "Alzheimer's disease"?; How can I identify the first stage of Alzheimer's disease?; What happens to the brain of an Alzheimer's patient? and more...

All our memory start to decline in our mid-20's, and this becomes more pronounced in our mid-40's. However, individuals with Alzheimer disease don't just have a subjective sense of memory loss. They also have a situation where by their ability to do things, to work or to socialize, have now become impaired to the point where other people notice. Those progressively get worst. This is certainly more than what age related memory decline would be expected to do.