Finding our way in the dark

John Beebe states that a nightmare is any form of upsetting, dreamlike cognition occurring in the midst of sleep. The author argues that a classification of a nightmare would be based not on physiological  findings, but on what the upsetting nocturnal occurrence turns out to be. He claims that  a true nightmare comes from deep REM sleep, out of which one awakens to a frightening dream that one cannot forget. John Beebe develops this claim by investigating a book called "vertigo", he looks at the different types of dreams mentioned in the book and bases his theories off of it. John Beebe's purpose is to inform you that there may be a possibility that dream classification may not be based upon physiological findings but on how upsetting the dream is.
          

Beebe, John. "Finding Our Way In The Dark." Journal Of Analytical Psychology 50.1 (2005): 91. Advanced Placement Source. Web. 7 Sept. 2012.