article_snippet: Normal sleep falls into a regular pattern of REM (rapid eye movement) and non-REM stages.
article_snippet: Every 90 minutes or so, a normal sleeper experiences several minutes of REM sleep, where dreaming occurs.
article_snippet: They then switch back to non-REM sleep.
article_snippet: This causes They to wake up regularly.
article_snippet: In addition, REM sleep can come on very quickly during the day and night, producing dream-like hallucinations.
article_snippet: My brain will cycle in and out of a sleep state and my body will carry on going, so