According to a new Harvard University psychological study, the thoughts we push out of our brains during the day seep into our dreams at night. The reason may be because the prefontal cortex–the part of the brain we use to plan and organize complex cognitive processes–doesn't work as hard when we're asleep.
"Maybe this is why students dream of sleeping through an important exam, why actors dream of going blank on stage, and why truckers dream of driving off the road," one of the researchers told Scientific American. "Dreams are where our thoughts go when we try to put the thoughts out of mind." Link
