Why Do We Dream?

The week we saw a video that informed us about dreaming and sleep.
Are dreaming are considered to reveal so much about who we are that sharing your dreams is considered as practically giving out personal informations and details of our life. Across the globe and in different culture dreams are considered meaningful, like they give a message. It is believed that when we dream are conscience is active so they express are true feelings or thoughts that would be otherwise ignored or forgotten. Nightmares however has the purpose of preparing us for bad events we might have to face later in life. In a way the prepare us from having a total breakdown and traumatic experience in which we couldn't ever recover, so we dream and our brain prepares our body for the probable event.
We dream in a stage called REM (rapid eye movement). This is a stage where our muscle tone goes down to zero so we cant act out our dreams. Nevertheless, there is some people who suffer REM Sleep Disorder, where the brain stem doesn't paralyzes the muscles during REM. With this scientist where able to see what we dream off and learn from these people.
The reason the majority o f dreams are negative is because of the closeness to the amigdula (a part of the brain that deals with intense fear, anger and aggression). In an experiment, the person that was waken up during REM had negative emotions.
One of the most interesting facts I learned from this video is that if we want to remember our dreams , we just have to say "I want to remember my dream" before falling asleep and you probably will. I personally have done that three times and all three time I have woken up and can remember somewhat what I dreamt.