Every night when we go to sleep, we spend a couple of hours in a virtual world created by our brains in which we are the main protagonist of an unfolding story we did not consciously create. In other words, we dream. For most people, dreams are mainly pleasant, sometimes negative, often bizarre, but rarely terrifying. That is, if they are remembered at all. Yet for about 5% of people, highly memorable and terrifying nightmares (bad dreams that make you wake up) happen on a weekly or even nightly basis. Recent studies have shown that people with Parkinson’s disease have bad dreams and nightmare…
