The idea is use it or lose it, work out your brain cells so they can stay active and healthy.

Let's say I park in Lot 3B in the parking lot, ... I might see my car with three large bumble bees hovering over it. I got stung by a bee when I was a kid so it has an emotional charge, and it's easier to remember.

One of the most striking findings was how it affected function in the area of the brain that creates everyday working memory. We may not have conclusive proof. But the evidence is strong. And these are all healthy choices for other reasons.

This suggests the technology may be useful in early diagnosis and in tracking people over time.

It's hard to prove a lot of these things, but I'm convinced there's enough evidence that there is a cause-and-effect relationship,

Initially there was disbelief. We all get up each day assuming that everything is going to be OK. But now you are thrust into a surreal experience and you have to worry about each step that you take.