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

Created by Carole Yue.

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[Azabael]

You have a very pleasant voice to listen to

[jidilcilanor]

Is it just me or is her voice very pleasing to listen to?
I can listen to her all day.

[DamonMacready]

Wow, no sound-effects or disturbing background muzak. Just plain good information from start to end! Thumbs up!

[redacted]

I gotta get up at 6 am. Been doing it for 12 years. Now, when I wanna sleep in, like the video says, my eyes snap open at 6 every day. At least I never miss the bus.

[khaledhusain]

You are a life saver. I am preparing for BCPP and this exact video saved my sleep wake disorders section. Thanks and extremely appreciated.

[animeart]

one of the best lectures on sleep that Ive seen. thank you for posting!

[ashishtorq]

Experienced first 3 stages while watching this video

[josephcoon]

6:45 More specifically Blue Light, like that found in electronic screens at high intensities. Children need high quality sleep which means lower consumption of blue light four hours before sleep.

Parents who are unaware of this and how use electronic devices as a distract mechanism for their children are severely damaging their ability to process information gathered during the day.

Also, educational endeavors should be done before sleep rather than after waking. Sleep is extremely efficient at organizing and integrating ideas collected during waking hours, and creativity is more potent in the hours after waking.

[sarhsone]

its actually alpha and theta waves not just simply theta waves in stage 1 NREM :)

[listenup]

Thank you so much! I was struggling to understand the stages. You just made my day! Just like that I got

[lycheemyusic]

During N1 I've gotten "exploding head syndrome" many times too lol, freaks me out every time

[mattyblake]

she is amazing with hand writing and voice and demonstration

[Jayongchy]

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.

[noeditbookreviews]

Has anyone read the light book: how natural and artificial light affect our mood, health and behavior? It has some good sections on sleep.

[vikramsrinivasan]

Awesome explanation. Thank you so much. 👏

[biswaroopjoarder]

Alright. That's wrong data.
The Textbook of Medical Physiology by Guyton and Hall (pretty much a bible) states that Stage 1 has low voltage alpha spindle bursts and not theta waves.
Stage 2 and 3 rather has theta waves being produced.

[HafizahHoshni]

OMG. YOUR VIDEO IS SO AMAZING! Thank you endlessly! 😊😊 20/3/2019

[emilylauren]

so when you wake up in the middle of the night are u in N1 or can you wake up in any cycle? ( if I wake up and then instantly start thinking/over thinking, ((bc of anxiety))

[TheDano]

Also, the reason why people sometimes don't remember their dreams, is because they awaken between cycles. Everybody dreams, not everybody remembers.

[lauraparthemer]

Please correct me if I'm wrong. Did you say that K complex helps with memory consolidation?
My book says that sleep spindles are the ones that help with memory consolidation. who is wrong? or if none is, can you please explain why the book says one thing and you say something different? Thank you and great job on explaining.