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9 Groundbreaking Discoveries About Sleep



There's a lot about sleep that we don't understand, like why we even sleep in the first place, for example. Here are some amazing discoveries biologists have made while trying to solve the mystery of sleep.

Hosted by: Hank Green
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Sources:
https://rarediseases.info.nih.gov/diseases/6429/fatal-familial-insomnia
http://www.nejm.org/doi/full/10.1056/NEJM198610163151605
http://www.nytimes.com/2001/05/06/magazine/3-case-study-fatal-familial-insomnia-location-venice-italy-to-sleep-no-more.html
http://www.sciencedirect.com/science/article/pii/016643289500020T

Brain activity
http://link.springer.com/article/10.1007%2Fs12576-015-0414-3
http://jnnp.bmj.com/content/74/1/9
http://science.sciencemag.org/content/81/2111/597

Brain centers
http://link.springer.com/article/10.1007%2Fs12576-015-0414-3
http://psycnet.apa.org/psycinfo/1932-00279-000
http://www.sciencedirect.com/science/article/pii/S0361923006000463

Memory
http://www.sciencedirect.com/science/article/pii/S0149763414002474
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5020097/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3768102/

Healing
https://www.ncbi.nlm.nih.gov/pubmed/16120095
https://www.ncbi.nlm.nih.gov/pubmed/9456469
http://www.sciencedirect.com/science/article/pii/S0306987711002234?np=y
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1299128/

Pain
https://www.uni-bamberg.de/fileadmin/uni/fakultaeten/ppp_professuren/physiologische_psychologie/Publikation/sleepmedicinereviews.pdf
https://www.ncbi.nlm.nih.gov/pubmed/25915149
https://www.ncbi.nlm.nih.gov/pubmed/216974
https://www.ncbi.nlm.nih.gov/pubmed/176677

Blue light
https://www.scientificamerican.com/article/q-a-why-is-blue-light-before-bedtime-bad-for-sleep/
https://www.ncbi.nlm.nih.gov/pubmed/23509952
http://www.pnas.org/content/112/4/1232

Dishwasher
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3551275/
https://www.ncbi.nlm.nih.gov/pubmed/24199995

Ancestors
https://www.ncbi.nlm.nih.gov/pubmed/26654373


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Автор bradOLF pittLER ( назад)
it'd be hard to discover all of this stuff without animal testing.

Автор Saleem Al-Agha ( назад)
i think wifi interferes with sleep

Автор offspring ( назад)
watching cat videos in the middle of the night?? meeen i did it sometimes

Автор Elizabeth Shaw ( назад)
I have horrific iretractable chronic pain which is not fibromyalgia. it is exhausting and I need to take a nap in the afternoon and I need 10 hours sleep at night or the pain explodes beyond what I can stand.

Автор alex parada ( назад)
I dont sleep cuz sleep is the cousin of death *thug life music and glasses then dies*

Автор SirMan McDude ( назад)
So being in non-REM sleep is where your brain files away and stores what it deems to be important while REM sleep is the brain saying "Fuck it, let's run some simulations 'cause we're bored"

Автор LittleMissGamerGal ( назад)
Dont look at devices a few hours before bed... yet im watching this before bed. i wouldnt have learned that unless I was exposed to blue light now..

Автор Fernando Alatorre ( назад)
It seems to me a bit naive to say "we don't know why we sleep" and on the other hand being so certain about all of the counter effects of not sleeping. Could it not just be that your body does that (sleeps) so that those terrible, fatal counter effects don't happen? Could it not be that your body knows (in a very broad sense of the word) that those effects will occur and thus intends to prevent them by sleeping?

I mean the guy in the video says, we don't know why we sleep... and then immediately after he says, a lack of sleep will literally kill you....

So maybe we sleep so we don't die?

Автор Private X ( назад)
Ok. Good night.

Автор ordinary Oddball ( назад)
I have f.lux on my PC and Night Shift on my iPhone, but I use my iPad the most in bed and it's old enough that it doesn't have a Night Shift. How do I make it do the orange light thing?

Автор z9elka ( назад)
poor rats :(

Автор Riste dzisev ( назад)
Man youre crazy i sleep with lights on and my phone on a youtube playlist the whole night with 2 pillows and a giant blanket over my head. Its pretty comfortable and i would much rather have that than pitch black and quiet and listen to my ears rinning and think the monster from russian sleep experiment or the devil with no eyes and blood is staring at me waitting for me to move and shit my pants jesusCHRIST

Автор Krishna Vma ( назад)
Thank you for this. All my life I've been a chronic sleep avoider, seeing it as wasted time. My loved ones will be happy to hear that you have managed to convince me that sleep really is necessary and mandatory. Cheers! 🙂

Автор Amazing Deep House ( назад)
the poor rats

Автор lamp 81 ( назад)
I really had no idea that fibromyalgia was worsened by lack of sleep. It really does correspond to my pain levels when I cannot sleep and I cannot do much the next day due to pain and fuzzy brain and lack of motivation. This pain builds up if I do exercise during a bad a day and then keeps me awake the next night because I cannot find a comfortable position. So...if I can somehow sleep then I can feel better and break the cycle! Thanks for the info! I am going to have to stop looking at my phone in bed and just listen to audible or white noise and maybe magazines, catalogues or crossword puzzles, even though that means I leave a light while I am fall asleep. Ok, giving this a try. Amazing!

Автор Out Of Place Ninja ( назад)
Wait, number six, there was somebody who purposely burned mice, then purposely deprived them of sleep for the purpose of "study"? Sounds like some areas of science is where the crazy people hide to stay out of trouble with society and the law lol.

Автор Lin He ( назад)
Here I am, watching a YouTube video on my iPad right before bed time.

Автор Sierra Miranda ( назад)
Don't we sleep because we're tired of doing shit all day???? I thought it as common sense

Автор kidego3kgt ( назад)
All those dead rats. RIP.

Автор Bill Hampton ( назад)
Anybody ever tried meth ? Holy fuck! , 80 hours without one wink of sleep . That shit is crazy I don't how people can keep doing that stuff .

Автор IAmAgainst ( назад)
Am I the only one thinking in the miserable life the rats in those studies had..?

Автор Muscle Man ( назад)
where did you get your shirt?

Автор Elena Sucec ( назад)
Poor Rats they take so much @&$% so we don't have to. They definitely got the short end of the stick

Автор Elena Sucec ( назад)
Who else is procrastinateing sleep staying up late watching YouTube videos!

Автор Eduardo Paulo ( назад)
Love the article. Great content! -- BUT THE FASHIONABLY-OVERUSED COMPRESSED CAPITAL TYPESETTING FOR NON-TITLES IS DISTRACTING AND HORRIBLY IMPLEMENTED AS ANNOTATIONS. BEST RESERVE FOR TITLES ONLY -- Still I loved the content! Thanks for this!!

Автор EatenRibs i-si-u ( назад)
" still running in the family* but they keep reproducing, such genes to protect ...

Автор Jim McBride ( назад)
"Sleeplessness makes pain worse." Seems reason enough for getting sleep, fwiw

Автор Dennis Jasperse ( назад)
So how do you explain most of the time set the alarm clock and most of the time you wake up maybe 5 minutes early!!!!

Автор Doug sillig ( назад)
is it just me or is Hank's voice a little raspy?

Автор Notlehs Bulb ( назад)
Anyone else watching at 3am?

Автор Michael Carter ( назад)
Why are you fidgeting and using hand gestures so much? It's random; like your just fidgeting just to fidget. Plus it's annoying. until you can tone it down, in unsubscribing.

Автор Mikael Durbin ( назад)
My wife and two children have FFI. This mutation is trying to take everything I love. Is there any breakthroughs anywhere? Vanderbilt didn't have a clue what we were even talking about. The dr didn't even take the time to google it

Автор spartanace13 ( назад)
8:05 Wrong kind of cat video, guess again.

Автор Mathy Don ( назад)
Aw those poor rats, what a way to die. Sleep deprived to death...

Автор Wolfpack Q ( назад)
I could use some sleep

Автор pete1 ( назад)
If you take one thing from that video it should be: don't get reincarnated as a rat!

Автор Ni Enye ( назад)
eeg isn't a new technique at all. wait.... how did I get here. I need to sleep.

Автор Dreterria Maiden ( назад)
So....we're Rats now ?😂

Автор Clarinet Catato ( назад)
Here's what I think are the two most important facts about sleep: The fact that sleep is necessary and how much you should get

Автор BvsMAcosh ( назад)
none of this is groundbreaking. Or even new.

Автор actsrv9 ( назад)
poor lab rats

Автор Vio ( назад)
i have such a shit sleep schedule/cycle i know my brain & body are getting rekt.

Автор Lester Stumpf ( назад)
am i the only one who is glad to not be a rat?

Автор Graxster ( назад)
I guess it's a good thing that I go to sleep every night. Oh wait... I wasn't even worried about it. :D

Автор apcolleen ( назад)
what did people blame insomnia on before electricity?

Автор Praise Pepe, God of Kek ( назад)
Well, that are happy rats

Автор edward Andrews ( назад)
i only sleep for a hour and a half, been this way all my life, ive never had any side affects, i always feel rested and alert, and i even dream, drove my parents nuts when i was a child

Автор bnighter ( назад)
so my kindle is killing me. softly.

Автор icedragonxl4 ( назад)
There were some incorrect facts in this video that I hope it's okay for me to correct. In the first discovery that says that sleep can kill you is incorrect. The truth is we don't quite actually know if that's the case yet or at all. Yes mice die after a couple of weeks with no sleep but the symptoms that cause them to die don't seem to show in humans I believe; and yes, fatal familial insomnia is deadly and kills those afflicted with it, but again, we don't know if it's the lack of sleep that causes the death or the other symptoms of the disorder. Also, the date in #3 was incorrect as well. The activity of the brain during sleep wasn't discovered until the 1950s at the University of Chicago using electroencephalogram.

Автор Ron Josh Ytem ( назад)
I wonder if the memory test was affected by the intermittent information gathered while the subjects stayed awake.

Автор Eileen Albers ( назад)
Fuck those people who kept the rats from sleeping

Автор Algore Daemon ( назад)
Indeed the correlation between sleep and memory is a very interesting one, particularly how deep-sleep is more related to memory consolidation (or perhaps 'dumping' instead). Now the thing I'm really curious about is the potential relationship between sleep and creativity, possibly also having to do with REM and the rich-associative and cognitive process of dreaming, which hasn't been given much thought in sleep studies at all until now. And this might have more to do with specific hormones but, you can ask any professional artist about their sleeping habits and overall productivity; you can't think and be genuinely creative unless you've had a good night sleep.

Автор lovexsqualor ( назад)
Wow lots of rat torture going on.

Автор Amir Khan ( назад)
here we are still trying to understand why we sleep in this "advanced age" . and we still able to confidently shun the existence of God . have you any proof ??!

Автор William Dwyer ( назад)
Prior to taming the dog (wolf), people probably had to sleep with "one eye open." Predators larger than us were in great abundance back then. So it wouldn't have been until dogs became common, that people could finally get a good night's sleep.

Автор Jinx4one ( назад)
If less sleep is bad, what is the effect of too much sleep?

Автор bluebooksky1 ( назад)
oh my God poor rats. 😞

Автор ilikeceral3 ( назад)
Discovery by me: wow! Getting a full night's rest really DOES help! Too bad I never do it.

Автор Trevor Carr ( назад)
Scientist's gotta laugh sometimes, we sleep because WE ARE TIRED simple really.

Автор Martin Collins ( назад)
That I'm not getting enough

Автор daisy3690 ( назад)
ty

Автор SajoieDeVie ( назад)
I have childhood onset idiopathic insomnia, so I can tell you that not sleeping sucks incredibly. Also, I watch a lot of insomnia related videos just in case one day doctors figure out my specific type of insomnia.

Автор Vijay Agrawal ( назад)
how did they make the rats not go to sleep?

Автор Piggy ( назад)
so ironic of me to watch this at 3 am

Автор vogonsrock ( назад)
Great video (although in this case didn't tell me anything new) but what I mostly went away with from this was 'gee rodents have *really* suffered in our attempts to figure out sleep'.

Автор TRUE JUSTICE ALLAH ( назад)
Best App for PC in my opinion for blue-light-reduction is; FLUX(f.lux)
The best for MOBILE are; EasyEyes(easiest), Twilight or flux mobile. I would use easy eyes as Twilight gets a little invasive.

Автор ummm... ( назад)
3rd of our lives spent sleeping? I average about 5 hours a night and sleep like poo. Guess I'm screwed

Автор Abdelgafar El Masry ( назад)
Hank, you're a legend, keep making those videos because you & Micheal are great presenters.

Автор 340PD ( назад)
The amount of calories that Hank Green burns during one of his videos would amaze you.

Автор Dari Bluestar ( назад)
Stop comparing rats to humans 1st of all & "a group of researchers" nah fuck dat... conduct your own research.

Автор Nathaniel Brigham ( назад)
I'm not against testing on rats, but still... Poor rats.

Автор Georgia Lloyd ( назад)
Omg I'm going to die really soon then

Автор Srijan Raghunath ( назад)
ironic because we are watching this on a phone, computer, etc.

Автор HAB ( назад)
Paleo-Sleeping = Awesome!

Автор HeyHay ( назад)
currently trying to heal a huge surgical wound going from the bottom of my rib cage to my pelvis. Lots of pain control and healing required. No wonder I sleep so much.

Автор Pur ( назад)
Hmmm wonder why as a teenager we remember things better (I slept 12 hrs a day then) vs as an adult (6 maybe 7)....does this also affect learning new things...."old dogs can't learn new tricks". Just saying...

Автор Emmie Knobloch ( назад)
Fatal Familial Insomnia doesn't actually kill you through lack of sleep - it's caused by misfolded prion proteins, like mad cow disease or Creutzfeld Jakob disease. Insomnia is a symptom of the degradation of the brain tissue in the thalamus, as the prion proteins form aggregates that inhibit brain function. You can die from lack of sleep, but this disease kills you by brain degradation.

Автор bret you ( назад)
they burn rats and deprive them of sleep to study the correlation, nice , who exactly are the vermin again? i hope I'm misunderstanding something here

Автор Jason Miller ( назад)
The shadow from his collar makes it look like he's got some serious chest hair

Автор Gauge Wiley ( назад)
All of this research has led me to one conclusive decision: Scientists are dicks to rats.

Автор christoc99 ( назад)
I had a nice dream last night🇦🇷

Автор Justin Phillips ( назад)
not only did they sleep deprive the rats until they died but they also burned them and then sleep deprived them?

Автор Eddie ( назад)
Ironic how im staying up, by choosing to watch the video instead of going to sleep...

Автор Pingu 42 ( назад)
I should be sleeping right now...

Автор WRINN GENOCIDE ( назад)
do viruses and bacteria sleep?

Автор David C ( назад)
"Scientists don't understand WHY we need sleep..."

*then explains how sleep deprivation destroys internal organs and kills us*

Автор Bearcat Ben ( назад)
Who else is watching this while supposedly trying to sleep

Автор Blanche Konieczka ( назад)
wish someone could explain to me why I often go into REM sleep within minutes of falling to sleep. my dreams are frequently vivid, colorful and complex. my oldest son also enters REM sleep within minutes of falling to sleep. Have researched this and most of the info indicates "normal" people enter REM sleep at least an hour after going to sleep. quickly entering REM has been linked to narcolepsy but neither my oldest nor I suffer from this condition. has any research been done in this area?

Автор Tess Wheeler ( назад)
I can't believe that rats were killed for this. I have two pet rats and I love them soooooo much and this nearly made me cry

Автор Michael Gugala ( назад)
you talk talk to fast

Автор theRPGmaster ( назад)
I'm watching this instead of sleeping

Автор lior kosoy ( назад)
if you sleep more youre going to live more
but if you sleep more you experience less life

Автор pissicutza09 ( назад)
Rat killers.

Автор J1.92c ( назад)
Sleep is the only door in to the 4th dimension... 😛

Автор duckmanjoel ( назад)
The question should not be why do we sleep, but why do we wake up. The earliest cells would be mostly 'sleeping' unless they got hungry. But like the evolution of hearing and sight, organisms 'woke up a little' to find food. The cells that evolved to stay active longer were able to survive. Multi-cell organisms continued the trend until we observe what we observe today. The best example I can give is eggs. The first eggs were in the water. Then animals returned to the water to lay eggs. Then animals laid eggs with a shell. Then animals held the eggs in their body. Mammals have a live birth but the amino fluid is like the early ocean. Sleeping is the neutral or natural state of life where it lives best. Sleep is evidence of evolution like the mitochondria DNA in our cells. Consciousness is the altered state of being. Sleep on it.

Автор Magnificent Maggie ( назад)
RATS RATS RATS

Автор Kelsqi ( назад)
Takes longer for burn wounds to heal? What the f.. That's terrible, we were burning them and watching how long it took to heal? F.

Автор blackplight4u ( назад)
Medical advances must be attributed to the mighty RAT! Let's thank Mr. RAT for his honorable sacrifices!

Автор R. Ke ( назад)
Watching this made me sleepy. 😪

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