Deterioration of the brain sneaks up on most of us. The first clue might be hearing loss, especially in the higher frequencies. We may be forced into bifocals, even trifocals.
But the most serious signs of deterioration occur in the brain. As we age, our reflexes slow. We walk and act slower. We even talk slower. Our memory starts to fail, such as the short-term memory ability that is so crucial for learning new things.