After being in an accident or going through some other type of stressful or traumatic event, a common piece of advice may be to get some rest, but a new study is showing that it actually may be better to stay awake. The study, conducted by researchers at the University of Massachusetts in Amherst, found that people who slept following a traumatic event had higher and intensified negative emotions. The researchers also found that sleep caused the subjects to remember their negative feelings about the event even more so, as if the event flashed over and over again in their mind as they slept. After further examination, the researchers believe that the cause of these effects are the amount of time spent in REM sleep, while the brain is busy reprocessing memories. The study may prove to be a breakthrough in treatment of post traumatic stress disorder (PTSD).