Keep the brain alive: what you don't use you loose

It is said that to keep one’s brain alive, i.e. not get Alzheimer disease, one must keep exercising it.

My wife is currently taking a Physics unit at university and is asking me to help her understand it because I did Physics before. I am surprised by how much I still remember and how much I have forgotten. I still remember principles, and have forgotten a lot of equations. E.g., I can’t remember the quadratic equation. It is disappointing that the brain puts aside information that it does not need or use on a regular basis.

Learning and education is not something that anybody can take away, but what you don’t use does goes away by itself with time. It is up to us to keep our brain and our memories alive by exercising it.