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Sleep stages and circadian rhythms | Processing the Environment | MCAT | Khan Academy

Оценок: 2000 | Просмотров: 326034
Created by Carole Yue. Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/processing-the-environment/sleep-and-consciousness/v/dreaming?utm_source=YT&utm_medium=Desc&utm_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/processing-the-environment/sleep-and-consciousness/v/sleep-and-consciousness?utm_source=YT&utm_medium=Desc&utm_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s MCAT channel: https://www.youtube.com/channel/UCDkK5wqSuwDlJ3_nl3rgdiQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
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Текстовые комментарии (76)
- Alexmegamind - (4 дня назад)
Your voice makes me sleepy 🤤
Doctorld (22 дня назад)
Very nice video
Sandy Laveda (1 месяц назад)
thanks :)
Naqaa Rose (1 месяц назад)
your demonstration with graphs sucks! REM sleep produces stage one which is mostly around beta and alpha so basically (same brain wave when someone is also in an awake stage but is in deep sleep/dream) None-REM stage consists of beta and alpha so when enter into REM it produces same brain waves. so it goes non rem beta, alpha , theta, delta and back to (beta) Rem. This consists of repetition of 5 cycles a night maybe consisting of longer beta(Rem) periods every cycle until awake.
B4TT3RY (1 месяц назад)
REM is a misnomer in that the eyes do not actually move rapidly. They move slower than when you are awake and don’t have to move whatsoever.
Joe Joyce (2 месяца назад)
you have a very nice voice
47 grapes (2 месяца назад)
Your voice is like a bunch of howling raccoons who are all drowning in a river while listening to one of Jake Paul's raps in distorted agony.
listenup69 (2 месяца назад)
Thank you so much! I was struggling to understand the stages. You just made my day! Just like that I got it!!!!!!
Nahoa spencer (5 месяцев назад)
Talking about you're "k complex" theory I do have dreams that are now in my long term memory as a fact that's forsure.
Zeno0344 (6 месяцев назад)
t took years and years to cure sleep maintenance insomnia. Finally I have found the cure https://www.youtube.com/watch?v=cl7f5SRDGU4
Veovea Miraculus (7 месяцев назад)
I did not sleep properly until I discovered this awesome bedtime calculator - www.sleepycrab.com it works like magic
Elena P. (8 месяцев назад)
Which stage has beta waves?
Naresh Burdak (4 месяца назад)
REM sleep
Mohd Maaz (8 месяцев назад)
best ever video found on sleep cycle must watch guys https://www.youtube.com/watch?v=vSNlmQgwAZc&t=6s
Chidera Okolie (10 месяцев назад)
u too much!
Dr Dwaitha (10 месяцев назад)
Why muscles paralyse during rem sleep?
B4TT3RY (1 месяц назад)
Dr Dwaitha Would be easier to answer which muscles don’t. Seems like the eyes can move but everything else is in atonia, but sometimes you’ll see leg movements or talking.
sam curtis (1 год назад)
Interesting. My son sleep walks. Plus 6 and half years ago my boyfriend would wake in the night and try force himself on me. It was scary because he felt so strong. But thing is he never remember doing it
Chris Willhite (1 год назад)
Interesting sometimes i would wake up at night and be super horny and have sex with my girlfriend really rough when she was asleep but it was like i was in a sensual trance and didn't think logically. She was info stuff like that though so she never did mind
Dm Suja (1 год назад)
I'm on a boat!!!!!!!! T-PAIN! at 1:15
47 grapes (2 месяца назад)
Your boat is fucking garbage.
haylee (1 год назад)
You are very conscious during sleep.. to be unconscious basically is to be in a coma or dead. or at least that's what I've been taught in my psychology class.
joeypinco (1 год назад)
Yayee P. Stage 4 of sleep is the closest thing to coma. Basically coma is a strong stage 4. Usually the majority of people during sleep reach stage 3 maximum and rarely stage 4 or if so only for little time
Rudy Santos (1 год назад)
Thank you tons for the lesson!
Roshan Ratnayaka (1 год назад)
Very basic, not really all that helpful
47 grapes (2 месяца назад)
totally agree roshan
Amber Abundantly Favoured (1 год назад)
Excellent video and thanks for giving visual explanations !
shanighias (1 год назад)
i have paper tommorow and its very high yield
47 grapes (2 месяца назад)
no one cares
Lisa Gonzalez (1 год назад)
Super good. Loved this video!
47 grapes (2 месяца назад)
fuck you
Lucas Haefner (1 год назад)
There are alpha, beta, theta, and delta.
TheDano1947 (1 год назад)
Also, the reason why people sometimes don't remember their dreams, is because they awaken between cycles. Everybody dreams, not everybody remembers.
Rachel Walton (1 год назад)
Nicely done :-)
Kabeerul Islam (1 год назад)
Most easiest explanation, another all video have made me puzzled.thanks Mam.
Mr.Black 261 (1 год назад)
Hоw I stаrted falling aslеep in 15 minutes oor leeеss => https://twitter.com/1a7b3a1cd49969b4d/status/822777083591999489
Ярый ТуР (1 год назад)
thank you for fantatic video!
47 grapes (2 месяца назад)
spelling you fucking idiot
Enoch S (1 год назад)
I keep going Straight to R.E.M. Sleep I skip all other stages of sleep.. I have vivid dreams and sleep paralysis even in naps
47 grapes (2 месяца назад)
Ok no one cares about your fucking sleep cycle enoch.
TWJ (1 год назад)
nice name, and do you sleep during night? as only in night does n3 occur
Estelle Dali (1 год назад)
I can fall asleep only when I am tired, and it can be anytime during the night,...quite often it it is at different times, so I do not live up to a circadian rhythm, I am completely fine with it.
Jid Lopez (2 года назад)
Is it just me or is her voice very pleasing to listen to? I can listen to her all day.
CircleInfinite (2 года назад)
Harr Chhetri (1 год назад)
Axel Blaze
Axel Blaze (2 года назад)
Охford Univеrsitу Revеаls: Quick Insоmniа Curе => https://twitter.com/49069ceaf70725527/status/804614583075733505 Slеер stаgеs and сirсаdiаn rhуthms Рrоосeеssing thе EЕЕЕnvirоnment МCАT Кhаn Аcаdemу
allawee1991 (2 года назад)
actually 4 hormones involved in this process:norepinephrine, Ach,prolactin & melatonin.
Raoul den braber (2 года назад)
You have a very pleasant voice to listen to
47 grapes (2 месяца назад)
+Sky Zone No she doesnt fuck you
ibro khan (9 месяцев назад)
Raoul den braber sameee
Sky Zone (9 месяцев назад)
Sounds like Amanda Seyfried..
Hafizah Hoshni (2 года назад)
Julien Prégent (3 года назад)
Why do I have hypnic jerks every morning? I mean it gets hard, it gets pretty hard
sarhs one (3 года назад)
its actually alpha and theta waves not just simply theta waves in stage 1 NREM :)
Joshua McSween (1 год назад)
Neew Reeeseearch: “Outsmaart Insoomnia” Cureeee => https://twitter.com/bb83123a4e0d62d94/status/822777083591999489
allawee1991 (2 года назад)
sarhs one no it's only theta waves,,Alpha waves are when you just close your eyes when you are still awake.
Don Draper (2 года назад)
Though might be true, your correction is quite insignificant in its impact given the type of substance in the video and the level of scientific sophistication of the viewers. In an hour, I guarantee you all the thetas and alphas mentioned in this video will be gone and probably just the gist of the concepts will remain with us non experts. And that's not an insult to you or an attempt to be condescending.
thrivesurvive (3 года назад)
Every time I have woken up (voluntarily or suddenly due to external stimuli), I have just been dreaming. This has been the case throughout my life. Does that mean I don't get really deep, restorative/regenerative sleep? Can one get really good, restorative sleep while dreaming? Thank you.
B4TT3RY (1 месяц назад)
thrivesurvive Waking up after a REM cycle is normal.
Ivan Mora (3 года назад)
Wow thank you
hi (3 года назад)
sorry you made a big  mistake . you should say Alpha ''∂∆∂"  instant  theta.
yztyzt1 (4 года назад)
how do u writ so good with a mouse? u r the god of writing with a mouse.  I have never seen anyone write so pretty with a mous  how u do it? thx
AJ 7 (7 месяцев назад)
yztyzt1 she uses an actual mouse
Nightshade (2 года назад)
+yztyzt1 digital pen & tablet
Jayongchy (4 года назад)
if i'm not wrong also take note in that stage 1 produce Alpha and Theta waves not just Theta, Stage 2 however is just Theta.
Lisa Gonzalez (1 год назад)
Stage 1 only has Theta waves. I'm reading it on my First Aid for USMLE Step 1 book. Also mentions it on Wikipedia :p. Stage 2 only has what Khan Academy mentioned: sleep spindles and potassium complexes.
Controversy Owl (3 года назад)
+Margie Galino I read that stage one involves alpha and theta, because alpha is already there from being relaxed and theta is there because it is the transitional period between awake and sleep. Then it is totally theta and total sleep at stage two. I though total wake and arousal is beta?
M Bar (3 года назад)
In N1 theres a vertex and theta waves. Alpha happenes during wake or arousal.
Sophie Warner (4 года назад)
thank you, this really helped me :)
Anirban Mandal (4 года назад)
I have hypnic jerks quiet often
TheWormzerjr (11 месяцев назад)
I jerk off in my sleep too.
Gabe Aivhram (3 года назад)
Same with me.....lol and after this hypnic jerks I tend to on safe mode where we would try to protect whatever we can from the fall....and for me...I think that is just weird
Holly Louise (4 года назад)
Interesting topic, but it is a strain to listen to this video because of the constant "up-talking". See: http://www.psychologytoday.com/blog/caveman-logic/201010/the-uptalk-epidemic for a good explanation. This bad habit is not just with young women anymore; men are doing it too. I hope my comment is taken as intended, which is to help produce better learning experience by speaking smoothly allowing the listener to focus on the information, not on the speaker. 
Holly Louise (3 года назад)
+Myiphone5 What on Earth is your problem? 
Holly Louise (3 года назад)
+Myiphone5 There was no attack whatever, and besides not reading my comment, you obviously you didn't read my link. So, if you don't like my comment, "that is personal and you should keep it to yourself and move on." Sheesh, grow up, would you? 

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