Dreams area unit unconscious experiences that involve vision, hearing, thoughts, feelings, or different senses in sleep, particularly throughout sleep in the midst of fast eye movement (REM sleep).
Events in dreams area unit sometimes not possible within the globe, and on the far side the facility of the dreamer. The exception is within the dream that's known as lucid dreaming. In such dreams, the dreamer realizes that he's dreaming once the dream continues to be current, and is typically able to modification the surroundings in his dreams and management some aspects of the dream.
Dreamers can even feel emotions once dreaming, for instance emotions concern in a very nightmare. an issue that studies concerning dreams is termed oneirologi.
Dreams occur at the stage of the speed of eye movement once sleeping, wherever bandeauin activity is high and as if in a very state of waking up. The length of the dream varies, a minimum of some seconds, or concerning 20-30 minutes. Opinions concerning the which means of dreams vary supported time and culture. Most fans of Freud's theory agree that the which means of vision in dreams is that the look of hidden needs and emotions. many different theories show that dreams area unit a stage of memory formation, drawback resolution, or just S128 product from brain activation.