Does your brain shink with age?

It actually does, aged 80 your brain typically weighs 15% less than it did when you were 20. Neurones aren't normally replaced with minor damage also, your neurones get less effective with age too. This is one of the consequences of our extended lifespan, like arthritis and cancer. But studies have shown that if you remain physically active in your seventies then brain shrinkage slows down!