The Sleep Cycle: How It Works And Explaining The 4 Stages of Sleep!

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Sleep has four stages: three stages consist of non-rapid eye movement sleep (non-REM sleep) and one stage consists of rapid eye movement sleep (REM sleep). The organized and structured process of normal sleep is known as sleep architecture. Typical sleep architecture consists of four cycles, each lasting an average of 90 minutes.

0:00 The 4 Stages of Sleep
1:26 N Stages vs REM Sleep
2:06 N1 Stage
3:36 N2 Stage
5:14 N3 Stage
6:16 REM Sleep

Read the Sleep Cycles article on Sleepopolis:

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#stagesofsleep #remsleep #sleepcycle

[Sleepopolis]

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[maryanna]

This is the BEST video I have seen in ages. When I graduated Nursing School in 1990- they didn’t teach about this information... and a lot of your information is likely fairly new. I need to watch this again tomorrow (when I am not sleepy) THANK YOU

[Ruby-fcho]

Wow, this video answered one of my life long questions.

[academico]

just found this channel, what an incredible content I liked it :D

[Outsider_aa]

very well explained, thanks for the video

[khaledalbelushi]

Thank you so much for this brief lovely introduction video. One more thing, may I've a references that you cite from including the link please. It's for educational purpose.

[professorschwartz]

Mind blown! Had no idea that when you go to bed influences the type of sleep you get more of! This was awesome; thanks!!

[ahireyuvraj]

HELLO CAN I USE YOUR VIDEO FOR MY SCHOOL PROJECT

[khushijain]

Can you also provide information about sleep paralysis

[dsavkay]

Very scientific and informative thanks

[joehill]

If you wake up during n2 and then go back to sleep does it start again from n1 or just go back into n2 ?

[anasrifqi]

Assalamualaikum dr, I'm Anas Rifqi Bin Mohd Azmi, in this video I have learned about the stages of sleep, I'm very interested about aspect of rem sleep which is new and very unic for me, I'm never know that our eyes was moving while we close it before, thank you for the explanation too, it contain good animation which help me more understanfing in image way than reading only ❤

[pittviper]

Hi. I do suffer from sleep paralysis. It is horrendous! Do you have information on this?

[coleenosmond]

I loved loved loved this video. I took nursing courses and worked in the health care field for years and learned more in this video than i did in my college and clinical courses. Great video that told me lots and i am really impressed with all of the information i learned.

[glacier__years_ago]

Simple and straight to the point, my best source for understanding sleep!

[jbtvsdg]

It’s a great informative video but unfortunately the music is too loud

[jonson]

Nice video - I am really grateful for the nicely animated schematics and the smooth transitions. A mathematical question though: if one circle is taking around 90 minutes, 4 circles would add up to 360 minutes or 6 hours. In the video 7-8 hours were propagated as normal, so wouldn't 5 circles be the standard? Or is it because or REM-phases tend to get longer, while NREM-phases stay the same length?

[barrymargolin]

Awesome video and explanation Zoey. I suffer from chronic insomnia, so its interesting to see what stages my body may pass unless I medicate with prescribed medication. Thanks again

[Vee_TheWorshipper]

Really interesting and easy to understand. Fantastic job.
I have a question though. I read somewhere that there are 5 stages of sleep. 4 NREM stages and the rem stage. The source also stated that many people tend to group n3 and n4 into one - the slow-wave sleep (as you did here) What do you have to say about that?

[uyoebyik]

I don't get stage 4 sleep. I have fibromyalgia. I wake up feeling horrific and I haven't dreamt for years