Final answer:
Dreams in REM sleep are vivid and narrative-like. Breathing and EEG activity are slowed during REM sleep. Muscle paralysis occurs in stage 3 sleep to prevent acting out dreams.
Step-by-step explanation:
In REM sleep, our dreams are more vivid and seem to take the form of a narrative. While dreaming in REM sleep, our breathing and EEG activity are slowed. In stage 3 sleep, but not REM sleep, our muscles are paralyzed so we don't act out our dreams.
Learn more about Dreaming and Sleep Stages