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- เผยแพร่เมื่อ 27 ส.ค. 2024
- Why do we sleep at night instead of during the day? In this episode of SciShow Hank talks about circadian rhythms, how they work, and how they regulate different processes in our bodies.
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*watches this video at 1am*
*falls asleep partway through*
*wakes up with tablet on face*
You win this time circadian rhythm...
with it paused at 2:37
@@Bobherry that graphic seems weird. Best coordination at 2:30a.m. and deepest sleep at 2:00p.m.?
1:15am of the third night awake.
@@SaltyRamen. I have no idea why I made that post i probably did it when i was super high and no i am not a programmer, I know someone who is and I want to punch him in the face
lol it’s 1:17 am while I’m watching this
I have a circadian rhythm disorder called Non-24 hour sleep-wake syndrome (N24). It actually evolved from Delayed Sleep Phase Syndrome (DSPS), another circadian rhythm disorder, because I was constantly trying to "correct" my sleep patterns to match everyone else's with chronotherapy. Listening to your body and taking care of it are so important: I'd still be on much more typical DSPS (or an extreme night owl), rather than N24 if I hadn't tried to correct it.
Without any kind of schedule, and just naturally going to bed and waking up, it would seem like there's supposed to be 25 or 26 hours in a day... my body picks up a natural schedule that I fall to sleep about an hour later each night and consequentially sleep in an extra hour. This keeps on happening until my days are nights and nights are days and then eventually back to normal. Just something I've noticed
That's exactly what happens with me, too. It's good to find someone I can relate to with this issue. :)
You see, I'm exactly like that with a small exception: my body won't naturally shift back to normal; I'll just keep sleeping from dawn to dusk.
Apparently blind people suffer from this as they can't "reset" their clock each day, and it leads to them being up in the middle of the night cooking large meals, or so the TV sayeth.
GT the Purple Me too. I seem to level out sleeping from 6AM to 2PM.
I'm the same way. Since I was maybe 18 or so I've been sleepy literally at least 95% of the time; it's become such a problem that I usually can't read books without falling asleep, even if I drink several coffees first. The only "advantage" is that I can go to sleep at any time of the day I have the opportunity (though it usually doesn't help). However, during this Christmas break I've been able to follow my natural sleep cycle for the first time in my life, which seems to be averaging about 25.5 hours/day, and I've been more alert during my wakeful hours than I have in years. I'm going to miss this so much, especially reading. It really was amazing feeling like myself again.
Thank you for making your video. My granddaughter will sleep from 5 in the afternoon til 12 AM and is up all night after that. I mentioned her circadian rhythm to her. I didn't have the exact explanation. I learned it a long time ago and simply learned to obey it. But you explain it well. Short sweet and to the point like 18 year olds like it. I'll share this with her!
If I don't have school, work, or any obligations I naturally tend to be nocturnal
me too
Haha same here .
maybe you are a highly sensitive person. (people who are prone to get overstimulated by the senses. The day is noisy and there's a lot to see while the night is pretty quiet and monotone.
Spend more time outside during the day, and don't drink stimulants past lunch time. Don't use your mobile phone/ laptop/pc/ table/ hand held electron device at least 1hr before bedtime... See how you feel after a week or two if this.
@@sos1474 tried that for about year. Still a naturally nocturnal person.
This Alaskan is laughing at you!! It's January as I write. I haven't see the sun for months.
hahaha
Interesting. How do we explain this? What is your sleeping pattern like?
There was a TED Talk about that. “Our natural sleep cycle is nothing like what we do now”
We don't neccesaarily need light/dark conditions to run the circadian rythm. The system is able to run independent of light/dark exposure, therefore termed as 'free running rythm' having period between 22-26h. Light/dark exposure just leads to fine-tunning of the mechanism to 24h.
Not everybody's circadian rythm is exactly 24 hours. It varies, but some studies show that 25 hours is common. Light helps to wake us up, and helps tune our rhythm, but we obviously wake without it.
Now that I've seen the outtakes video, I'm impressed every time Hank successfully completes a line. :)
I'll try to convince my microbiology professor that sleeping during his class is in everyone's best interest. I don't think it'll be easy though...
I'm so glad that in Finnish universities most courses don't have mandatory attendance, mainly just laboratory and field courses. We get lecture slides online, often even video recordings of the lecture.
@@MilnaAlen I feel like Scandinavian countries will be the first to reach a utopia or something similar. You will be the first countries without a government but something else with a lot less power.
"Late night redditing" nailed it.
Taneth 😍
Are you still alive?
Ah these comments are so old
@@tranquilious yes the date of their playlist videos are maybe 2-3 years ago
I want to subscribe just so Hank can afford a comfy shag carpet in the studio.
This is probably one of my favorite scishow videos :-)
Hank you are my hero! Seriously don't ever stop doing what you do. People around the world like me depend on you to teach us, and to make us laugh, and you do it all for free! I will be checking into this subbable thing but I'm a procrastination master. Perhaps a scishow episode should cover that, oh wait I think you already did. Or maybe that was asap science. Either way your my favorite science guy and I want to thank you for keeping it fun.
What about those of us who are naturally nocturnal? As far back as I can remember (and I have confirmed this with older relatives for periods of time further back than I can remember) I've always been alert much later into the night than other people and had a much harder time waking in the early hours. It's not insomnia, because once I am asleep, I sleep soundly through the night. It's like my ideal sleep cycle is to go to sleep at 4 am and wake around 2 pm.
Me too! My parents say I've been like this since I was a child. Another thing is that if I lay down (or even just sit, sometimes) during the day, I get sleepy right away. Like, 15 minutes after I laid down, I'm already about to fall asleep. But if I do the same thing at night, I can be staring at the roof for 2 hours. And it has nothing to do with my sleep pattern or the number of hours I have slept before, it ALWAYS happens.
Same here! HANK please help us understand!
Look into Delayed Sleep Phase Syndrome on Wikipedia- that should give you some answers. :}
the1butterfly Thank you for the tip, but I'm already well aware of it's existence. Unfortunately, Wikipedia only discusses it as a disorder and the ways to treat it. I am someone who has been able to (mostly) cope with Delayed Sleep Phase by taking second shift jobs, running my errands in the evenings and doing my grocery shopping at 24 hour grocery stores. So Wikipedia is of no use to me here. Hank was talking about the reason WHY most people have the diurnal sleep phase and that's the heart of what I'm really curious about. I want to know the WHY of the nocturnal among us.
More importantly, I want to know why all information about delayed sleep phase treats it as something that -must- be cured or treated. I rather like being nocturnal. The only time it is a problem for me is if I am required to work a shift that is out of phase with my sleep phase or when people don't believe that I truly am nocturnal and think I'm just being lazy or a pain in the ass when I won't do things in the mornings.
I see what you're getting at. My guess is that it stems from a few factors. One is probably artificial light and generally being out of tune with nature. Another, which probably is more the behind the reason is probably natural variations in the body's production of melatonin and response to light (if you were less responsive to light, it wouldn't matter if you left the house with the sunrise to tend to animals, for example- you'd still be more exposed than we are now), and then my guess is that there's a certain amount of random genetic variation that we've been more able to cope with in the last few centuries. (Quick internet search wasn't much more helpful than my guesses.)
I work for a neurologist specializing in migraines and one of the first things we do for new patients is put them on a strict sleeping and eating schedule. A lot of times when you have constant migraines your sleep patterns become disrupted causing your circadian rhythms to get tossed out of wack. Long story short, sleep more, have less headaches.
I like how you seemed to be randomly flailing your arms when attempting your gesticulations while laying down
Okay hank, I'll get some more sleep if you personally tell my english teacher why I couldn't finish the project due tomorrow.
Yeah... next time, you might wanna consider starting working on it sooner than the night before O:-)
Lucie Ferstová Unless you have to do it for THE NEXT DAY YOU GET IT (Like my English teacher does)...
Oh it can't be that bad in that case:))
Lol
But school starts at 7:30.........
That floor *does* look pretty comfortable...
Your name makes me think of "A Christmas Story"
TheMarshmellowfellow lol Your name makes me think of Ghostbusters.
lol :)
Hank, please do another one of these explaining those of us who are naturally backwards and nocturnal. It is not my alarm or my work or a live stream that does it to me, it's my whole life. And it's not often set to 24 hours, either! Often I have 36 hour cycles, or longer. I have been this way my whole life, even as a kid I remember staying up until the wee hours only to fall asleep a couple of hours until I had to get up for school.
I keep dozing off at around 1:30 pm in my Calc III class, so I'm glad there's an explanation for it!
I sleep and wake according to the sun but in opposite, I wake when the sun goes down and sleep when the sun comes up. I actually was able to go over 5 years without ever seeing the sun. I guess I'm one of those odd people who just function better at night, I remember growing up I could not stay awake while the sun was up but once it was down I was hyper and ready to go.
Same here dude. Glad to know I'm not the only one, haha
CommanderRDash Yeah we are werewolves!
same it makes college so difficult
Why wouldn't heat make you sluggish & tired?
Why wouldn't we feel more active when it's quieter & the stars are out?
I'm skeptical of any science implying there's a "normal" sleep pattern.
It's like saying everyone is better off eating the same foods & living in the same climates.
Spoken like a true vampire.
My circadian is all jacked up
I have no idea why, but I no longer require an alarm clock to wake up anymore. I just naturally jolt awake 5 minutes before my alarm goes off. I guess that's just because I've been on the same work schedule for months now.
I've heard similar stories. You got a good Rhythm going.
+Onizuka Sensei I'm the same, even on weekends. :(
+Onizuka Sensei well if you're in your early 20s that can happen, your brain just stops being on a teenage (aka sleep till noon) clock.
My late cat would always wake me up before the sun begging to be fed, after he died I not only didn't get my wake up call anymore I got up consistantly between the hours of 5 and 6 am.
so when i'm sleeping in class i can blame it on my circadian rhythm. awesome.
And here I am watching scishow videos until around 5 AM or even longer the past few days...
I usually sleep in the afternoon, but sometimes at night or morning or evening... it's random. I don't have a schedule.
Matthew Long The suspense is killing me!
frumpy4 *sigh* just add a comma after the what and stop being in suspense
grammar nazi
that means you don't have a healthy sleep schedule and your internal clock is really mess up, prolonged period of this will cause more hormonal related health issues, and even make you look age faster.
Are you a grad student?
why you ask? i'm just curious
Interesting. And yet I always feel a surge of mental energy in the evenings. The longer I'm awake, the sharper I get. Until the sudden plummet into sleep that is.
I live in north Sweden, So in the summer we have midnight sun, when the sun never really sets, its always light outside. And in the winter we have just about 3-4 hours of sunlight and 18 hours of just darkness.
So all of this about sleep cycles and how light and darkness effects sleep hormones (from "Why We Need It and What Happens Without It" episode) works in an entirely different way than this or whats "normal".
Would love it if SciShow could make an episode about this.
Thank you!!! I'm working in a project about circadian rythms and the connection of these with temperature and it was of great help. Really useful and interesting( as always ;) ).
Missed opportunity to talk about DSPS! (delayed sleep phase syndrome) Night owls!
Not everyone has the same rhythm, some even have a 'reverse' or greatly delayed rhythm and function fine! With the exception of dealing with people and society frowning upon you 'getting up late' or stores closing 'early'.
I prefer night-owl-ism and getting things done over constantly living like you have a 6-hour-jetlag. Winters give me a SAD though.
My guess would be that some people developed a late night schedule naturally to watch for predators while everyone else slept. It was probably a survival mechanism. I don't know if that's really the case but it kinda makes sense.
suicune2001 I believe that's one of the hypothesis, yes! Makes sense to me anyways. Evolutionarily speaking that is. When it's dark I usually just sit and stare at code or a book, crochet, cook, watch TH-cam and get startled by things making noise outside =p
Samantha Nicola Perhaps the tribal instincts of primitive humans still exist within our genetic code and a mutation can cause it to arise in people.
I also believe that I have DSPS
and have done alot of research.
When I mentioned it to a doctor I was advised to buy one of those
"sunlight" lamps and get up an hour early to use it.
☆ Between 1:00 a.m and 2 a.m. is my typical bedtime. I've been this way my whole life and I am a senior. Getting up early has always been difficult! When I was in college and teaching I would set 3 alarms.
☆ p.s. funny...I have my phone and t.v. and no other clocks so I don't realize we've switched to day light saving time until I'm delighted that it's lighter later.
You know, historically we weren't monophasic sleepers, either. We weren't trying things like Uberman or Dymaxion or anything, but people would naturally get up for a couple hours in the middle of the night, and this waking time was generally viewed as a time for intimate or sacred activity. (Which sheds an interesting light on the ancient Christian monastic tradition of the Midnight Office, I think.) Eventually (I want to say in the 17th or 18th century, but I'm not 100% sure) the upper classes started simply sleeping through the night, and it spread down to the masses. Just an interesting historical note.
I take a 30 minute nap between 3:30 pm - 4:30 pm every day when school's in session. I always get tired after school, but after my nap it feels like a whole new day. I'm glad there's a good reason for it. Though I could stand to eat better and get more energy that way as well.
Guys, "circa" does mean "approximately" in Italian but in Latin it was used with the meaning of "around", "about"; so the etimology of "circadian" is actually "around the day".
While on the topic of biological rhythms, could you do a video on polyphasic sleep? I'd much appreciate it.
watching this at 3:36 AM
+pramitbanerjee 5:03 AM for me
3:38 ;)
Same
4:48 am
4:59am. At this point I think I've fucked up my sleep patterns beyond repair.
This guy has literally taught me biology, chemistry and some history. He is the Apex of human knowledge.
I usually cut off at the last 30 seconds of video, but for some reason, Hank laying on the ground kept me watching...
it's literally 2:30 where I live and now I feel a bit better about going to take a nap
When I'm not working my body for some reason has a preference for locking into a moon phased rhythm. It's very easy to slip into, and practically impossible for my body to come out of without depriving myself of sleep for 12 hours.
I get this as well ( it tries to even when I do have stuff to do, and hard to suppress). To get back on schedule what I do is stay up 1-3 hours more than i usually do, so that I'm tired and wake up later and later every day until I catch up to a "normal" sleep cycle again
leodaza3
That's probably a more healthy method than mine, I refer to it as Restarting my sleep schedule and I stay up all night and as long as I can the next day generally going to bed that day at around 3pm, then waking up around 10am.
have the same issue. except it started very early on and i had trouble even going to school. I'd be dead tired in the morning and could never fall asleep in the night. Now i'm actually kind of pissed at the school system since apparently i'm simply nocturnal, which isn't that uncommon,
Thank you Hank for explaining this. I thought I was weird for sleeping in office during that period of 2pm and 3 pm. but now I know I am completely normal.
i keep feeling like the crash course theme will play anytime now.
Hank do an entire episode on the carpet!
I laughed so hard at the end, he looked so intoxicated
Play that part at 0.5 speed....he then also sounds intoxicated... ;-)
The people who is watching this video after 9 years like 🗿🗿🗿
I like it when shows can do their own things with no or few restrictions, like laying on the ground, without those "higher ups" making it a big issue that they do such things.
lol I love Hank...
Oh I have a request for a video. Why do only some people feel the urge to have children? I have never felt the urge to have children, and in fact, children REPEL me, rather than attract. (And I am at the age where it wouldn't be strange for me to have children, both in society, though a lack of job/husband/etc might impede that part, or in biology.) Is there something up with my brain?
Edit: I should clarify, though it is very nice of you all to be so concerned over me, I am not worried about something being wrong with me or that whole "I'm not normal" jazz. I was just curious if there was a hormonal or genetic reason as to why I don't have the desire to have children. Not even in a "Oh, in the future, I want a child." (And I do have biological urges for sex and romance so it's not that.)
I would be willing to bet that you were the most obnoxious child ever.
Hey don't worry about it. The people who are all like 'you're just too young to understand, you'll definitely change your mind later' and 'OMG children are little bundles of joy and miracles and rainbows you're a monster for not liking them1!111!!!!' are so obnoxious. I'm not sure about the scientific aspect, probably something to do with your natural levels of estrogen controlling how maternal you feel or something, but it's definitely not unnatural to not want children, or not like them at all. I mean, sure they're cute and sweet sometimes, but they're also bratty, snotty, and poopy and fuck up a lot of your nice things. It's just so sad to see so many people who aren't meant to have children being pressured into it by society and their families who say 'it's only natural that you have to spend the next 18 years of your life pouring hundreds and thousands of dollars into another human being you have to make!' and are just miserable. Just have children when you feel that you are ready, in a good position to do so, and most importantly, want them, even if that means never. It's not like we're in a shortage of people on earth anyways. Be happy and do what's fair to a potential future child and screw what everyone else thinks :)
Part of it is being in a relationship, and your gender. I used to be strictly opposed to the idea myself. For women, the urge tends to kick in during your mid twenties to early thirties, but if you're not intimate with someone it might not affect you so much.
taddy829
*an
I feel the same way. Lots of my friends (who are indeed women) want a baby. Some now, desperately want one, some are waiting for the right dude. There are two people in our little group of friends who are dead set on not having a baby, me and this other chick and her bf. We're all 20 btw. So yeah, I would like to know why some women and men get this urge to have all the babies, and some people just don't
Hi Hank.
How does the Circhadian Rythm (i know i didnt spell it right) affect humans who live above the polar circle?
Why not just look up a bit and see Circadian spelled in the title? -.-
MrQwerty2524 dont be so mean :s
***** Becouse when you're on an ipad the comment window covers the title line. (also im lazy :p)
This was 7 years ago 😂😂
I've worked night shift for about 12 years. It took about 2 weeks to get used to sleeping during the day. The whole trick is blackout curtains and *actually letting yourself sleep.* Over the years, the biggest problem I have seen with night shift workers is refusal to sleep. They find excuses to stay up far too late into the day or get up much too early in the afternoon, and complain about the lack of sleep. If you have 16 hours from the end of one shift to the beginning of the next, you can find time for a solid 7 hours of sleep somewhere in there.
Another great video! Thank you all very much!
It's uni holidays here in Australia atm, sometimes I sleep at 7-10am, wake up at 5:30pm. Even did it for all nighters during uni. I used to have a proper sleeping pattern, not any more. Fu/k you too uni, especially IT degrees.
I hate afternoons; 2-4pm = worse time ever.
So what happens when that rhythm is flipped? I've heard all my life that it's impossible in the human species. Bull. I'm horribly tired all day, and once that sun sets, I'm completely fine. Even my brain starts working clearer and faster. When the sun is about to rise, I get very drowsy, and once it's risen, I'm absolutely exhausted. I try and tell people that I'm nocturnal, and they laugh, and reference vampires. I've tried over and over to flip my schedule the other way, and did nothing but spent months too tired to move, and wishing I'd just die already. I originally thought I had insomnia until I noticed how I could easily sleep during the day... usually through classes...
Same. 'Nuff said.
Just woke up from night shift. Thanks Hank for rubbing this in my face.
Great to see a new point of view today rather than the same old vertical.
I used to a uni class at 1pm, and I felt like a jerk because by 2pm I would be passed out in my chair, much to the dismay of my professor.
THE PINEAL GLAND AT 1:37. YES. OPEN YOUR THIRD EYE !
Three cheers for psychic intuition!
That green-screen to floor transition looked great.
I had a 1pm class in a comfy squishy chair in a warm classroom with a monotone professor, boy did I get some lovely naps in during that class.
When I was working swing shifts at a pizza place my body settled in on a 32 hour day. I joked at the time that I was on Saturn time.
What about night owls like me who become 'more' healthy if we're allowed to sleep from 3AM to 12 PM instead of 3 or more hours earlier than that?
Some of us, like you, have our sleep phase in a different part of the day from most people's. At least yours stays put. Mine's all over the place.
Its because teenagers and young adults have different sleep schedules than adults and the elderly. This is probably caused by switching sleeping and watching the pack during night while adults are sleeping.
according the video this is normal...
2am-4am our desire to sleep is stronger according the video....
so this.... is ok
i sleep the best from 8am-10am to 4pm-6pm.....
I'd love to see a video on why some people have different sleep cycles. I have a similar pattern to yours if I'm on a regular schedule. If I don't have anything to do for awhile I seem to fall into a 30 hour day. And no, I'm not a teenager anymore.
6AM - 2PM here. I feel your pain.
Hank is my favorite on sci show
After I watched this I decided to attempt an experiment and changed my sleep pattern from once a day to sleeping twice a day, from 2 AM to 6 AM, and then 3 PM to 7 PM. My body didn't like it for the first few days, but after that I felt all around more alert when I was awake, and fell asleep easier when I laid down. It felt good.
If all Circadian rhythms are synced with the rising at setting of the sun, then how come I work my best after about 9pm, and sleep best after 3am? If I sleep the same time, but at different hours of the day, say 11pm to 8am or 4am to 1pm, I feel much more rested with the latter hours. So clearly my Circadian rhythm is not the same as the way you describe. And this has been the case all of my almost 20 years of life, so it's not a one-time occurrence.
I agree it has nothing to do with sun it looks like its more about our habits and state of mind.
*****
I actually disagree. I think it still has to do with the sun, but for some of us, it's just the other way around. Though abnormal, some nocturnal animals do walk around during the day, just as some sols sleep all day, and are awake all night. Perhaps it's the same for us, and just as abnormal, but there's enough humans on the planet to see it more and more.
lukus black Yeah it makes sense but you have to wonder why some animals are nocturnal and why those abnormal ones act that way. While observing domestic cats I noticed that for example ones that don't leave house/appartment at all are more active during a day because they never hunted or had need to keep territory. My cat is very active during a nigh and by day he naps and goes to his routine territory check. That alone make me think it has nothing to do with sun and more about activity in our case its goes step further considering we think and feel more.
Someone had to stay up to make sure that the rest weren't eaten by hungry tigers..... :P No really, I've had this since I was a little child (my parents said it was the best and worst thing about me.. I wouldn't go to sleep until very late at night... but then they got to have a sleep in lol). I'm still not 100% sure on what "it" exactly is.
Delays in melatonin release have been noted in people (and teenagers!), that can cause some people to be night owls. Nocturnal habits can actually point to the onset of some more critical conditions such as schizophrenia and narcolepsy. Other studies have shown that if we break our sleep into 2 with 4 hours sleep then wake up at midnight for 2 hours for optimal cognitive function and then sleep a further 4 hours is suppose to be our "optimal" sleeping zone. Yet all these different variabilities seem to point to one major point for me.
I think that we have created a "normal" time period of (awake) day and (sleep) night and based our society around it. Therefore, anything not fitting into these slots are abnormal. Yet I'm sure any creature can determine the perils of a species that has a bed time. When sleep times are determined in a light and time (no.. normal times passes, just no clocks to shout out the perceived time to you) free zone (deep caves), we don't follow a 24 hours pattern. In fact we stretch it to nearly 25 hours.
Now to start the time wars revolution (lol), we need an international time point. All time is based off that. Then our societies meld around it. Schools are no long just location but also time frames. you may wake up and go to the mid day starters or the mid night starters. Effects of sleep deprivation are well documented - not just in science but Hank's sleep deprived bobble head conversations and something about horses and pudding. So perhaps it's time for us to shed our shells of enviro-time conventions and begin the optimization of time systems... I give you opto-time (I have no idea why my friend banned me from ever creating names for ideas.. my names are awesome!).
Jon
I agree, I feel the same way. It's unfair, and almost discriminating that "our kind" has to conform to the daywalkers. Our societies have all but adapted to people who are awake at night. They think we're different, we're wrong in the head, we need to be set right. So they give us melatonin sleeping pills, but they don't work, they give us a sleeping cycle to train us to sleep at the "right" hours, but they just can't accept the fact that it's not a condition that can be fixed. To us, sleeping during daytime, while being awake at night feels natural, it's how it's supposed to be.
Aside from the fact that our bodies are atuned to a 25 hour day/night cycle, I personally have the problem that I become more awake when the lights dim. I also have jetlags, so it's not a thing that can be fixed by going to the other side of the world so my cycle is reveresed. It simply is that I'm (more) awake at night than during the day.
So we need a 24 hour economy, stores and workplaces should not stop working, they need to be open continuesly, not only will this boost the productivity for people like us, the nightwalkers if you will, but it will also kickstart the ever dropping economy, by keeping you buisness open 24 instead of 8-12 hours, you can create more, sell more and have an entire subspecies of humans interested in your buisness.
So let's hope we can make a stand here, let's raise our voices, we want to be considered as well, we have rights too!
Yeah... lately I've been falling asleep between 5 and 7 AM and waking up between 12 and 4 PM. I'm gonna be totally screwed when classes start back up again in two weeks...
I've been on about the same sleep schedule, waking up every day at about 4 PM. Classes just started back for me this week. Yeah... That hurt.
Piper16180 Yikes. Good luck from now on, man (or girl?)!
I am a secondary school student in Hong Kong, and your speaking is so fast that i have to pause frequently. So, big thank you for the subtitles ! your channel is great
The Picture at min. 2:37 is all messed up: deepest sleep at 2pm and fastest reaction time at 3:30am !?
I'm disappointed in the lack of mentioning dsps
Sci show is so awesome!
Oh, how reaffirming !, I am fortunate to be able to follow what my body/brain tell me to do. I have been living this way for years. Sometimes I have even felt a little guilty for the blessing of being as fortunate as I am. No more !!! Follow your bliss...
And now you need to do a video on the difference between morning people and night owls.
I'm crying foul at the entire 'scientific' theory presented in this video. Circadian Rhythms are NOT universally 'set' in each individual to rise and set with the sun. It's disappointing to discover that this video (which should actually dispel the stigma that true 'night owls' are 'weird' just because they aren't like everyone else, due to their own unique Circadian Rhythm) falsely defines the concept as universally dependent on the rise and fall of the sun, which only fuels the ignorant belief that 'normal' people naturally rest at night and wake during the day.
thank you, used this for nursing fatigue exam :)
super useful re-watching this. no more sleeping with the blinds pulled. Let that morning sunlight activate a full wake-up
Sleep is less important than passing Calculus, Hank. Obviously.
What is the address for sending you weed?
why? lol
I think this is one of the best episode you guys ever made for SciShow
All my life, I could only sleep after a very late night. It eventually became daytime sleeping only. Problem, indeed? No, I'd be broke without that. Thank heavens for the 'malady'. I took a 11-7am job that no one else wanted, parlayed that by sleeping 8-1pm and got 2 degrees at night. Thanks for giving me this problem...
watching this at 6am...
Your avatar fits perfectly with your comment.
what about blind people
There are other environmental cues that help keep up sync say for example morning temperature, smell, etc. Of course these are not there to fully supplement the loss. At the same time there are articles stating the person having impaired eyed sight / relevant cells have disorders and faces difficulties.
When I worked as a computer analyst I was in Taipei, Tiawan. Each afternoon everyone in the office would take a nap. It was offical office policy and they would lower the lights and everyone would lay their heads down on their desks and sleep. This would last for about a half hour and then the lights would come back on and work would resume. I was only in Taipei for a couple of weeks but the afternoon nap was great and I really missed it when I came back to the States.
A half hour? Man, that wouldn't even be long enough for me to fall asleep. Damn insomnia.
Oh, Hank, you're at your best when you get a little silly. Hopefully I'll be able to support your work this year!
Watching this at 5:00am thanks to an American to Australian flight. Yaaaayyyyy jet lag!
Australia.. the place where the moon is upside down.
No wonder my classmates are always miserable.
Thanks for the supplement NMN, that has helped me correct my distorted Circadian Rhythm.
Of course, I'm watching this at night, while sick. Thanks, Hank!
Not to be confused with the cicadian rhythm.
If you suffer from insomnia, here's your answer..
This is freaky timing. I was just studying this topic for my Biopsychology exam which is in 9 hours! Very accurate and interesting. Good stuff! :)
As a student, we went caving (spelunking) for 5 days (long cave). Our instructors held our watches. When we finished, our instructors told us that we moved to a 10-12hr awake / 10-12 hr sleep cycle. (supposedly because we were in constant darkness)
I, uh, haha, accidentally my Circadian rhythm.
Is that bad?
You did WHAT? :o
cristixyz
I accidentally my circadian rhythm. The whole thing. The WHOLE Rhythm
Jysrin El-Lagni Yanu dude, i have no idea if your just trolling but if your not then this sentence makes no legit sense
***** Could you put a little more emphasis on the old part, like seriously that was back when Google Chrome didn't even exist to run it, I was still running Internet Explorer back in those days.
thumb up... if you watching the video at 6:15 am with no sleep...
i like the way u teach......best. explanation....i was smiling all d tym
Watching this video at 3pm and I'm so sleepy I was considering a nap. This made me feel much better about that decision. :)
lol im watching this at 3 A.M probbly should go to sleep aswell but dont feel the urge to go
I watched & liked many of your videos, but this is the 1st one i thumbsdowned.
Highly-skewed, you disregard Northern/Southern sleep patterns, countless non-24-hr lifeforms, & even use cats as an example of why napping is good.
Hunter-gatherers likely didn't sleep according to the sun, they were simply aware of it. Disappointing that nobody questions the 24-hour cirkydirky rhythm.
I just assumed he was talking about statistically average human sleep patterns. Thanks for the perspective.
Well there's focusing on statistically average, then there's teaching. I think many of the people who find the science of sleep interesting would also be interested in conditions where people don't follow such natural circadian rhythms (e.g. Delayed Sleep Phase Disorder, or Non-24-Hours circadian rhythms).
I've been up for 27 hours now. I should sleep. :DDDDDDDDDDDDDDD: Is it a love of happy faces or is it a line of sad faces? You'll never know...
It is one happy face and one sad face with a line of multiple chins betwixt.
And this class, is how Insomnia looks.
Buff Duck It's okay, I've slept now. Unfortunately I managed to get into debates about racism on youtube before doing so though... Why...
thank you very much .... this video has made my concepts more clear... I like it!
I clearly do not have any such thing.
I've always hated sleep and never felt tired anyway and when I was 8 I finally decided to start ignoring the nonsense daily sleep that people do. I've seen better sunrises, but that one is still the most that sticks out in my mind because it was the first one I ever saw.
At this point I sleep about once every 6 days (and then only about 3 hours before I'm raring to go again). Regardless of how often I do sleep though, I don't actually sleep because I feel tired. I just get bored once I've met my goal(s) for that waking period and resort to the old standby from my childhood so I feel ready to mentally take on a new task/set of tasks.
The complete opposite of my brother. He doesn't have much down time (not by choice like myself - work) but his stated goal is to sleep for a full day. So far he's made it to 21 last we talked about our weird sleeping (or not in my case) abilities.
in a similarly scientific video i explain how to make a fleshlight out of a block of cheese on my channel
you dirty fucking liar
it's on there. how to live on a budget mccominator
MCCOMINATOR My mistake! keep fighting the good fight good sir.
thought you might like it
"fleshlight out of a block of cheese" - wow, what a great idea! ...Just don't expect to eat the cheese afterwards...
I just wanna say twitter, instagram, and snapchat stink.
This is my favorite channel!!! Keep it free and keep up the good work!!!
I like your fast talking 😀..feel like I have a storm in my mind, good luck and thank you .
So if I stabbed my Hypothalamus, then I could sleep forever..?
Spencer Barton or never...
+PokeMaster22222 I wasn't really trying to include death in the statement, but since you brought it up, true, very true.
Maybe! Death is a type of sleep, I suppose...