Why do brain processes slow down with age?
Like most older machines, the brain undergoes slow physical deterioration. This is aggravated by declining use. In the early part of life, the rapid pace of learning makes continuous, powerful changes in brain machinery. However, as people get older, they often become like concert violinists who have stopped practicing. Resting on their laurels, they still play a pretty good fiddle, but a practiced ear could hear that their skills are gradually fading.
