Conclusion DREAMING EXPLAINED
Each night, we spend about one and a half to two hours dreaming. We dream about once every 90 minutes of sleep. The time you spend in dreams becomes longer throughout the night, from about 10 minutes to around 45 minutes or slightly longer. But what happens when we sleep?
There are five stages of sleep: four stages of NREM (Non-REM) sleep, also called SWS (Slow-Wave Sleep), and one stage of REM (Rapid Eye Movement) sleep. The most vivid dreams, and therefore the ones we remember the most, occur during REM sleep (though we dream in other stages too). One sleep cycle is roughly 90 minutes long.