Are you not spending enough time in dreamland? If not, you may want to change your sleep habits. The effects of too little sleep on the brain appear to be more significant than previously thought. It’s long been known that too little sleep can cause memory related problems and reduce alertness, but a new study shows it may also increase the risk of Alzheimer’s disease. In a study published in the journal Science, researchers at Barnes-Jewish Hospital in St. Louis found an association betwee