Sleep – An Entire Help Guide To REM Sleep and Sleep Stages


Sleep physiology / Non Rapid Eye Movement/ REM sleep/ sleep centres

Video taken from the channel: Medical & Exercise Physiology School


Sleep Cycle, EEG Waves Mnemonics, NON REM Versus REM Sleep

Video taken from the channel: Dr Anshuman Tripathi


A brain pathway to control sleep

Video taken from the channel: BMC


Lecture 9. Sleep Mechanisms

Video taken from the channel: Icahn School of Medicine


Mayo Clinic Minute: What are the stages of sleep?

Video taken from the channel: Mayo Clinic


Understanding our sleep cycle: REM and non-REM sleep

Video taken from the channel: MyWorkplaceHealth


What’s REM Sleep How Much Do You Need?

Video taken from the channel: Sleepopolis

Rapid eye movement (REM) sleep and; Non-rapid eye movement sleep (Non-REM Sleep). More on Non-REM Sleep. Non-rapid eye movement sleep can be further divided into four stages called stages 1, 2, 3, and 4 (yes, it’s very imaginative ) Stage 1. Stage 1 (light sleep) occurs within minutes of falling asleep and lasts only about seven minutes or so. Usually, REM sleep happens 90 minutes after you fall asleep. The first period of REM typically lasts 10 minutes.

Each of your later REM stages gets longer, and the. During an average night’s sleep, we move through all four stages of sleep several times, alternating between non-REM and REM sleep. As we go through stages 1 to 3, our brain waves begin to slow, yet when we get to REM sleep, our brain wave activity resembles that of wakefulness. Stage R: REM Sleep. REM sleep is essential to re-energizing your mind.

REM is associated with dreaming, memory consolidation, learning, and problem solving. The time spent in this sleep stage usually decreases with age. During REM sleep, you can expect the following: respiration increases; heart rate increases temperature regulation is switched off.

REM sleep occurs 90 minutes after sleep onset. The first period of REM typically lasts 10 minutes, with each recurring REM stage lengthening, and the final one lasting an hour. The period of NREM sleep is made up of stages 1 to 4. Each stage can last from five to 15 minutes. Sleep begins in stage 1 and progresses into stages 2, and 3. After stage 3 sleep, stage 2 sleep is repeated before entering REM sleep. Once REM sleep is over, the body usually returns to stage 2 sleep.

Sleep cycles through these stages approximately four or five times throughout the night. 9 . Sleep is split into two main categories: Rapid Eye Movement (REM) sleep, and non-Rapid Eye Movement (NREM) sleep Typically, people experience several stages of NREM sleep before a final stage of REM sleep. Each sleep cycle contains REM (rapid eye movement) sleep, but not necessarily deep sleep. The first stage of sleep is about 90 minutes, and adults usually have at least four or five sleep cycles per night, amounting to 6–9 hours of sleep.

All four stages of sleep are considered in your Sleep Score: awake time, light sleep, deep sleep, and REM sleep. Deep sleep is key for body restoration (e.g., muscle repair), while REM sleep is associated with dreaming, memory consolidation, learning, and problem solving. There are four stages of sleep: Non-REM (NREM) sleep (Stages 1, 2 & 3) and REM sleep.

Periods of wakefulness occur before and intermittently throughout the various sleep stages or as one shifts sleeping position. Wake is the period when brain wave activity is at its highest and muscle tone is active. Stage 1.

List of related literature:

NREM sleep is now divided into stage N1, stage N2, and stage N3 (slow-wave sleep); REM sleep is now labeled as stage R. • Wake after sleep onset: time spent awake during total sleep period.

“Bradley's Neurology in Clinical Practice E-Book” by Robert B. Daroff, Joseph Jankovic, John C Mazziotta, Scott L Pomeroy
from Bradley’s Neurology in Clinical Practice E-Book
by Robert B. Daroff, Joseph Jankovic, et. al.
Elsevier Health Sciences, 2015

More importantly, normal sleep progresses predictably through the different stages, moving from REM to stage 2, deepening from stage 2 to stage 4, backtracking to stage 2, and then switching back to REM.

“Evidence-Based Practice of Critical Care E-book: Expert Consult: Online and Print” by Clifford S. Deutschman, Patrick J. Neligan
from Evidence-Based Practice of Critical Care E-book: Expert Consult: Online and Print
by Clifford S. Deutschman, Patrick J. Neligan
Elsevier Health Sciences, 2010

The first four stages are stages ofNREM sleep, while the fifth stage is REM sleep.

“Tabbner's Nursing Care: Theory and Practice” by Gabby Koutoukidis, Gabrielle Koutoukidis, Kate Stainton, Jodie Hughson
from Tabbner’s Nursing Care: Theory and Practice
by Gabby Koutoukidis, Gabrielle Koutoukidis, et. al.
Churchill Livingstone, 2012

Note that stage 1 sleep is absent after the first sleep cycle and that both stage 3 and REM sleep follow stage 2.

“Blueprints Neurology” by Frank Drislane
from Blueprints Neurology
by Frank Drislane
Wolters Kluwer Health/Lippincott William & Wilkins, 2009

These two stages are NREM and REM sleep.

“Rau's Respiratory Care Pharmacology E-Book” by Douglas S. Gardenhire
from Rau’s Respiratory Care Pharmacology E-Book
by Douglas S. Gardenhire
Elsevier Health Sciences, 2015

Returning through Stage 3 and Stage 2 (where you spend about half your night), you enter the most intriguing sleep phase—REM sleep.

“Exploring Psychology, Eighth Edition, In Modules” by David G. Myers
from Exploring Psychology, Eighth Edition, In Modules
by David G. Myers
Worth Publishers, 2010

In other words, both NREM stages 3 and 4 and REM sleep act as if they have the properties of needs requiring they be kept in homeostatic balance.

“The Social Science Encyclopedia” by Fellow of the British Academy Adam Kuper, ed Kuper, Adam Kuper, Jessica Kuper
from The Social Science Encyclopedia
by Fellow of the British Academy Adam Kuper, ed Kuper, et. al.
Routledge, 1996

These authors further suggest that REM and NREM sleep evolved from a single, phylogenetically older sleep state.

“Sleep Disorders Medicine: Basic Science, Technical Considerations and Clinical Aspects” by Sudhansu Chokroverty
from Sleep Disorders Medicine: Basic Science, Technical Considerations and Clinical Aspects
by Sudhansu Chokroverty
Springer New York, 2017

These findings suggest that Stage 4 and REM sleep are of special importance.

“Fundamentals of Psychology” by Michael Eysenck
from Fundamentals of Psychology
by Michael Eysenck
Taylor & Francis, 2014

These two stages are NREM sleep and REM sleep.

“Rau's Respiratory Care Pharmacology E-Book” by Douglas S. Gardenhire
from Rau’s Respiratory Care Pharmacology E-Book
by Douglas S. Gardenhire
Elsevier Health Sciences, 2019

Alexia Lewis RD

Registered Dietitian Nutritionist and Certified Heath Coach who believes life is better with science, humor, and beautiful, delicious, healthy food.

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  • Never heard of REM Atonia. Wow, this is much more serious than I thought. I knew sleeping is important but I did not know how much how I sleep matters too. Thank you for the educational video.

  • I want to know as often as I remember my girlfriend SHENARA it’s very important me and valuable for it causes to REM?

  • Good to know. Very helpful and informative. I have an app i use to monitor my sleep pattern called Sleepscore and its pretty cool, according to it i average about 22% in rem sleep a night in my sleep cycles.

  • I had no idea that the reason why we are technically paralyzed, or our bodies shut down for sleep and regeneration…is also so we dont act out dreams and hurt ourselves and others. SO interesting! Thank you for all the great knowledge!

  • I didnt think I was getting REM sleep but after I bought smartwatch I realized I actually DO get more than I thought. I even reach a “deep” sleep. I love my smartwatch now. Thank you for this information.

  • Hello ma’am I want to ask you to that whenever I sleep in afternoon I have dreams that seems totally real and I want to react on it then later in dream I found that it is dream so I want to wake up but I can’t coz I feel I went into deep so it’s difficult to wake up and when I wake up I feel that I got paralysed for a few time what the thing is that it only happens in afternoon time Plz tell me what it is??

  • Ummhhhhh was anyone else led here after watching ‘2 Chainz: Most Expensivest’ episode on sleep masks…………or is it jus’ me??

  • Maam, I am a student and sleep for 5 hours, during my 5 minutes or even less time naps I dream too it normal? it completely refreshes me for the whole day but some people are saying that it’s not good please do clear my doubt ma’am, please!!!!

  • I had no idea your eyes moved during REM sleep O.o and might have a better idea of why I hurt so much in the morning, guess I am not getting enough REM sleep..thank you for this information!

  • I started using a CBD product and now sell it cuz it’s been wonderful. I always get to REM. No nightmares, no waking up to check my alarm. I have had no episodes of sleep paralysis. I love it

  • I get too many dreams, even when I am taking a power nap. Each time a dream gets over I wake up. I can remember them as well. Is there something wrong with me?

  • I guess my REM ain’t working right because I have woken up to me sipping a drink or even punching. Why is that? I also wake up with bruises?

  • I think this is a good overview of REM sleep. I have issues with sleep so I’m not sure it’s anything I didn’t know. I know that when I get inadequate sleep, my short term memory is affected.

  • Kyonki sir agar aap Hindi me batayege to English student ko bi Hindi aati hogi agar aap English me batayege to Hindi bale students ko Jada samjh nhi aayegi plz. Sir Hindi me bi bataye

  • REM Antonia is real. I used to have it. I don’t anymore, thank God. This is an interesting video. I like how research states that we don’t act out our dreams. Sleepwalkers act out things and don’t remember the next day. So strange!

  • I wonder if this REM rebound is something my nephew might suffer from occasionally? He pulled an all-nighter while his mother was in the hospital, then when he took a nap during the day, he jumped up like he’d been hit and attempted to sleepwalk. I had to wrestle him back into the chair so he wouldn’t hurt himself and my sister said that he must have been really tired because he hadn’t done that in years. At least now I know what might have caused that behavior.

  • So interesting!! I love learning stuff like this. I have a condition that causes me to hear loud BANGS �� (explosions) while I’m asleep that wakes me up. They sound SO REAL that at first I was convinced something bad had happened in the house. It happens about once or twice a month and started about 2 years ago. There are some studies done on this but no one knows why people get this condition. I didn’t know about the disconnect between the brain and muscles during REM. Makes so much sense to keep people from hurting themselves..that was interesting to learn. Thanks for all the great information! I’m gonna read up some about this as it fascinates me.

  • Sir ji aap EEG NCS PFT EMG ke bare me difference difference topic banaye sir or Hindi me bataye English ke sath..sath Hindi me bi please sir kyonki me Training Kar Raha hu EEG. PFT NCS ki

  • REM is so important to your health, unfortunately I hardly reach REM when I’m so uncomfortable I’m waking up every 30 to 40 mins. Sleep has a huge impact on the body.

  • is there anyway for us to shorten the sleep cycle?

    a little bit of my personal experience, there are times when i wake up in the morning and feels like i don’t get enough sleep and i’ll just hit the snooze button (it’s bad i know) and what happen is really weird.. i’m sure i feel like i’m falling back asleep, like into a deep sleep and when i wake up i thought “oh no, i must’ve miss my alarm since i didn’t heard it anymore after i hit the snooze button” but when i look at my phone it’s only been 1 minute since i hit the snooze button (my snooze last for about 5 minutes). the weird thing is i feel refreshed as if i have slept for 7 hours during that 1 minute. i can’t control this and it just happen randomly.. i experience this a few time already. anyone else who has the same experience as me?
    and if anyone else know about the theory behind this or better, how to trigger this condition, mind sharing it with me?

  • Rem sleep is something I RARELY reach. I have suffered from Insomnia most of my life. I rarely get a good night sleep or any sleep. I would love to have a deep sleep. I always feel really tired and soar when I wake up. BAD bed and BAD sleeping is a BAD combo. I have a hard time shutting down my thoughts.

  • They can do this thru nervous system manipulation, many patents up on which show that tv frqs can manipulate the nervous system and even make a subject (dog, cat, rat, human) sad, horny, mad, depressed happy. Ect.

  • Rem sleep is very interesting to me, thanks for the thorough info! Such an important part of sleep. Thank you for the great info, i am enjoying the videos.

  • Before I started taking meds for my prostate, I would wake up to go to the bathroom often enough to mess up my REM sleep. Even dreaming of using the bathroom and waking up in the middle of dreaming. Affected my short term memory among other things.

  • Very interesting info. I snow plow during the winter and my sleep gets all messed up. I haven’t slept much over the past few days and I always seem to turn into a zombie lol I’ll have to work on getting more sleep to keep my rem in good working condition. LOL

  • The other day I acted out a dream while I was asleep and accidentally smacked my wife’s body. She wasn’t hurt, but I wonder what stage of sleep I was in when it happened. Great info.

  • Wow this is really informative! Didn’t expect this from you guys. Sleep paralysis sounds terrible. I wonder now how much REM sleep I actually get..

  • When someone’s had a recent trauma and having flashbacks, do they get through all stages of sleep? How can they prevent the nightmares that go along with said trauma? Asking for a friend.

  • I learned the REM sleep is very important to my sleep cycle. I get about an average of six to six and a half hours of sleep at night and I’m good to go. Any more than that and I feel that I have over slept.

  • I got a little freaked out when i learned that you are basically paralyzed during rem sleep. That this is a way for our bodies not to act out dreams and become dangerous to ourselves and others.I loved listening to the sections done by Dr. Krainin, i learned more about sleep than i ever thought i could and i loved the way he explained everything. This was a great video

  • Lucid dreaming

    I have a problem. When I have dreams, I will not try to be a dream, I just wake up and lose it as a memory, I do not feel that I have been in the dream.

  • GIVEAWAY NOTIFICATION calling all sleepers! To get more entries in our monthly mattress giveaway, just click the link below and enter your information (so that we know you clicked through). And keep an eye out to win more entries on the next video!

  • I got a question does everyone go through all the sleep stages? Can you just go to like stage 2 or not reach rem sleep? Say if someones a light sleeper as they call it.

  • 24:16
    Can someone explain the role of sensory input network? It inhibits and excites projection neuron simultaneously. So why exist at all if its sum zero?

  • Brilliant lecture. I watched it several times in order to take notes. The projections are a little hard to read, but that might be due to my age and eyesight.

  • Please sb answer so i took acid and in my sleep I felt like I died and I couldn’t wake up I tried saying mom but nothing would come out now I’m scared to gts like I would never wake up again

  • Thanks alot Sir, had found all your videos very insightful and helpful especially to the fact that you are making it in the language everyone could understand. Really very grateful. Keep it up|

  • Dear Dr. Tripathi,
    thank you for this really informative video! I have one question; doesn´t sleep talking and teeth grinding mostly occur in the second stage of NREM sleep?

  • This was all very interesting. I am surprised by a few things. I didn’t know that Rem sleep is so important. It is crazy that someone could be violent during sleep. Thanks for all the great information.

  • I found it fascinating that our muscles go “off-line” during REM sleep(Rematonia) so that we do not act out our dreams during the night. I had no idea about this.

  • hello sir mere born ke time nhi roya tha dr. se baat huyi to wo bole ki, aapka kachra nigal gaya hai or toilet apne maa ke pet me hi kar diya tha jiske wajh uske pure body me infection ho haya tha jiske wajah se wah nhi roya hai or na rone ke wajah se usko leukomalcia ho gaya hai or abhi ka problem ye hi ki jab bachha sokar uthta hi to usko jhatke aate hai 10-15 baar bahut se jagah maine elag karaya pr ye thik nhi ho rha hi abhi main usko bhu hospital varansi me dikha rha hu or EEG test huwa usme eeg change dikha rha hai or MRI ka report abhi nhi hi to aapse se request hai aap hame guide kare taki behtar elaz kara saku or mera bachha thik ho jaye. mera ek hi bachha hi. mare name -vivek kumar mobile no -9097625438, address -siwan,bihar, india-841241 [email protected] note: sir aapse anurodh hai ki app koi pratikriya de mere es msg pe.

  • Really very useful doc u are gonna become good you tuber one day like dr.najeeb congratulations for your future….wishes from heart and thanks for making me understood finally