Shifts in color, behavior and movement are evidence of a sleep cycle in octopuses, Brazilian scientists say, with the octopus switching between active and quiet sleep … Having regular dreams doesn’t seem to impact your sleep quality one way or another, as dreaming is a completely natural process. Some vivid dreams are classified as good and others as bad. Since those with untreated sleep apnea experience a lack of sleep, they experience extremely intense dreams when they do reach REM sleep. Most dreaming occurs during the fourth stage of sleep, known as rapid eye movement (REM) sleep. REM sleep is characterized by eye movement, increased respiration rate, and increased brain activity. Dreams from the first four hours of sleep were more related to waking life, from the recent past to the present to the anticipated future. During REM sleep, study participants reported both intense dream vividness and improved memory of dreams which occurred during that phase, which suggests that dreaming typically occurs REM sleep: we know that dreaming also occurs during NREM sleep; however, in comparison, these dreams appear to … Image Source: Terry Cralle, RN. Sometimes these dreams may also be associated with death. What Happens During Non-REM Sleep? Dreams typically happen during REM sleep . The majority of our dreams – especially our most vivid, wild, or even nightmarish dreams, will occur during REM sleep. But negative vivid dreams, especially if they last for weeks or months, can be emotionally disturbing and disruptive to your sleep. So, if you want to find what your dream about sleeping really means, you have to remember as much as details as you can. Most people will also dream, although not everyone can remember doing so. And that can cause … While it can be difficult to remember dreams once you wake up, if it feels like you rarely dream at all, it could point to a disorder that causes restless sleep, known as sleep apnea. The American Sleep Foundation suggests that people spend approximately 20% of their total sleep in this stage. Dreams and Sleep Quality. During sleep, many parts of the brain are still active. But understand that vivid dreams are rare and may have additional underlying causes, such as stress and general lack of sleep. Processes such as breathing and circulation are normal. During their active periods of sleep, octopuses' skin color changes and their bodies twitch, according to a report in the journal iScience, and they might even have short dreams. Also, dreams about sleeping may represent your mental or your emotional exhaustion, so you would like to have more time to sleep in your real life. 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