To Sleep, Perchance to Dream: Crash Course Psychology #9

Why do we sleep? Well... that's a tricky question. More easily answered is the question, "How do we sleep?" In this episode of Crash Course Psychology, Hank discusses some of the ways our brain functions when sleeping and how it can malfunction as well.


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Chapters:
Introduction: What Happens When We're Sleeping? 00:00
What is sleep and why do we do it? 1:20
How do we sleep? 1:56
Rapid Eye Movement (REM) 2:38
4 Stages of Sleep 3:08
Sleep Deprivation 4:28
Sleep Disorders 4:47
What do we dream about? 6:08
Why do we dream? 7:26
Review & Credits 9:46
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[Katie__]

Hank: "sleep is important"
Me, at nearly 2am, working on a presentation: "sleep is for the weak"

[atcslay]

I learn way more from this guy in 10 mims than I do from all my teachers In week

[eileenbraswell]

Video: *starts talking about dreams*

Me: “Close your eyes, shut your mouth, dream a dream and get us out. Dream dream dream dream dream dream”

[ws]

They only forgot to mention the hypothesis in which our dreams are just simulations of problems from which we can learn to survive better.

[miguelrothe]

After being raised by a psychiatrist my whole life I have started breaking the fourth wall in my own dreams when they get ridiculously psychologically heavy-handed (which is often). One time I dreamed I was a kid in the back seat of a car and the driver disappeared and I just went, "Screw this, I am too old for latent abandonment issues", and woke myself up by crashing.

[Justin_GFM]

Does anybody else have dreams about stuff that ACTUALLY happens later on during the day? Like for example, you dream about a fight happing during 5th period lunch. Then when 5th period rolls along, french fies and barbecue sauce and burgers and honey mustard and blood start flying everywhere, and you think, "Wait, I had a dream about this!"

[PaniniWasteland]

I remember I caught my sister sleep talking when I was getting ready for work and she screamed "I'M NOT GOING TO DO IT!" It startled me pretty bad but it was pretty funny.

[Shyles]

4:12 "REM sleep is sort of paradoxical. Your motor cortex is jumping all over the place but your brain stem is blocking those messages leaving your muscles so relaxed that you're basically paralyzed except for your eyes."

You just explained Sleep Paralysis. It's freaky.

[Xenolilly]

I struggled with Math for a long time, but my teacher who actually helped me told me to sleep after learning a difficult concept.. This was the first class I was able to excel. Study plus sleep really worked for me. Perhaps it was just a placebo. Who knows.

[abiguzman]

This guy is doing great. i feel like i can learn more accurate viewpoints of how this whole science thing works. I hope he has calculus videos or starts doing math too

[Torguish]

Running naked, teeth falling out chased by a Matt Damon centaur....

This should be a movie. Definitely should be a movie.








Someone make this a movie.

[sjbrooksy]

Glad I'm not the only one who's had the Matt Damon centaur dream.

[ranpo_edogawa]

I actually had a dream where if I typed 65 into a calculator I would travel through time. The first thing I did was travel to a Wal-Mart to get Halloween themed brownies. Anyone else wanna share their dreams?

[MadelineLewis]

Has anybody else died in their dreams? One night I dreamt that I was on a dark porch staring at a candle. Woke up several times but went back to that same scene every time. Then at around 6 in the morning, a man came out of the dark, picked up the candle, and burned me to death. The rest of the night all I saw in my dreams was black. Never happened again, but it did scare the heck out of me.

[salmonsalmon]

I once dreamed of Link and Zelda having a Pokemon battle

[TeaDrinker]

The accuracy of the Fight Club reference was genius

[TheTwinkieFairy]

I've heard that sleeping (and dreaming) is also a time when we "clean out" our neural pathways. Like, getting rid of unneeded junk we acquired throughout the day and making our memories of important things that happened (that we want to remember) and putting them in our dreams. That's why a lot of times our dreams are based on our day. People with weirder dreams either have nothing of real value from the day to commit to memory, or just spent too much time playing that certain game or just did nothing and let their mind wander throughout the day.

I once had a dream and when I woke up I had one thought:  "You don't have the third breast of creativity!!" 
I still have no idea what that means... -.-"

[PikachuDenki]

Is it bad that I got tired during this video? And almost fell asleep twice?

It's not because the video is boring (it's not, I love Hank and psychology), but I'm just really tired suddenly ...

The only reason I'm commenting is because Hank said, "If you stayed awake during this episode, you learned ... " at the end, and it was quite amusing. It felt like some sort of jab at me for almost falling asleep. Lol, oops.

[ADyingFaith]

Anyone experienced sleep paralysis. That is terrifying.

[Aly-ymyi]

I've been watching these videos because I just started my psychology course (today was day three), and I really want to learn more about some of the topics that we've discussed so far. Definitely not disappointed. CrashCourse never fails to impress me and teach me tons of cool information. 😊❤