Dormant People

Lately I have such crazy dreams. It is odd enough to have them, but for some reason people from the past have been appearing in them. The people are ones that have no significance in my life and never did. They are college friends and friends I worked with forty years ago. Why are they lying dormant in my brain waiting to come out and play at night? What nerve endings are they attached to? If you really sit and think about it, where are memories stored? We know that we have a brain that consists of grey matter and swirls, but I cannot fathom the actual workings of it. Other organs are easy to decipher. Blood runs through veins, air fills the lungs, food flows through the digestive system. These are all concrete functions. The brain is another story that I cannot truly figure out. My brain can't solve the question of my brain.