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Chuck Bryant
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Chuck Bryant
Hey, everybody. Happy Saturday. It's Chuck here, and I'm here to deliver to you my pick for this week's Selects episode. This is from July 2017. It's the episode How Fever Dreams Work. And quite honestly, you guys, I picked this one because I don't remember much about it. So I'm gonna listen to it all over again myself. So I hope you do as well. Hope you have a great Saturday and a great weekend. Here we go with how Fever Dreams work.
Narrator
Welcome to Stuff youf Should Know, a production of iHeartradio.
Josh Clark
Hey, and welcome to Podcast. How are ya? I'm Josh Clark. There's Charles W. Chuck Bryant. There's Jerry. Jerry's got a salad. Everything's normal, which means it's time for stuff. You should know.
Charles W. 'Chuck' Bryant
That's right.
Josh Clark
Jerry's got the shawarma special, she said.
Charles W. 'Chuck' Bryant
Oh, really?
Josh Clark
Yeah, she loves it.
Charles W. 'Chuck' Bryant
How you doing?
Josh Clark
I'm good, man. Feeling despite myself. Kind of relaxed.
Charles W. 'Chuck' Bryant
Okay.
Josh Clark
I'm not feeling feverish, if that's what you're driving at.
Charles W. 'Chuck' Bryant
No, that's not what I was driving at.
Josh Clark
Yeah, no, I'm not.
Charles W. 'Chuck' Bryant
Do you get fevers a lot?
Josh Clark
No, not anymore. Although I haven't for a long time. I've never been a fever person. I've probably had a handful, maybe. How many fevers have you had?
Charles W. 'Chuck' Bryant
Not a ton since I was a Kid. Not a lot of adult fevers. I mean, I've had hip hop fever. I've had rock and roll fever.
Josh Clark
Yeah. Yellow fever.
Charles W. 'Chuck' Bryant
I've had the fever for a flavor of a Pringle.
Josh Clark
Oh, man, me too.
Charles W. 'Chuck' Bryant
What are those? Those aren't even potato chips, are they?
Josh Clark
They're potato crisps.
Charles W. 'Chuck' Bryant
Man, those are good.
Josh Clark
They're mashed together potato parts.
Charles W. 'Chuck' Bryant
I don't think I want to know how those are made.
Josh Clark
No, it's like Chicken McNuggets.
Charles W. 'Chuck' Bryant
I think a unicorn just poops them out.
Josh Clark
Have you seen unicorn pizza? It's a little much.
Charles W. 'Chuck' Bryant
Oh, what is it?
Josh Clark
There's a restaurant in New York, I'm not quite sure where, maybe Lower east side. They have unicorn pizza. It's like dough.
Charles W. 'Chuck' Bryant
Okay, good start.
Josh Clark
Like a nice pastel colored frosting instead of sauce.
Charles W. 'Chuck' Bryant
Yeah.
Josh Clark
A mound of cotton candy. Nerds or Pop Rocks, maybe.
Charles W. 'Chuck' Bryant
Oh, good Lord.
Josh Clark
And then some other stuff. Supposedly it tastes kind of good. I'll eat anything that has enough frosting on it.
Charles W. 'Chuck' Bryant
I like frosting, but I'm not into, like, sugary candies. Really?
Josh Clark
Oh, like nerds and Pop Rocks and stuff.
Charles W. 'Chuck' Bryant
Nah.
Josh Clark
You know, I did brain stuff once on Pop Rocks. That was interesting.
Charles W. 'Chuck' Bryant
Yeah.
Josh Clark
Yeah. Your tongue actually warms the pop rocks to the point where they melt. And since they have CO2 trapped inside during the manufacturing process, that CO2 suddenly is released in a pop.
Charles W. 'Chuck' Bryant
So it's just a little bubble of CO2.
Josh Clark
Yeah.
Charles W. 'Chuck' Bryant
That's gotta be good for you.
Josh Clark
I'm sure.
Charles W. 'Chuck' Bryant
It's funny, I had a roommate in college. Not many adults eat candy. People eat chocolate and stuff like that. Candy bars. But candy candy, I don't know, for an adult is just a little strange, don't you think?
Josh Clark
Yeah.
Charles W. 'Chuck' Bryant
Do you eat candy?
Josh Clark
Sure.
Charles W. 'Chuck' Bryant
Like what?
Josh Clark
Mentos. Not mint Mentos, like candy Mentos. I like those.
Charles W. 'Chuck' Bryant
Well, I had a roommate that would go to the convenience store next, and this was college granted. Right. But he still eats this stuff, I think.
Josh Clark
Okay.
Charles W. 'Chuck' Bryant
And he would go with like, $15 and buy, you know, like giant sweet tarts, you know, those big chewable ones and like fun dip and nerds and just all kinds of candy.
Josh Clark
Fun Dip or Lick a Maid. It was the same thing, I think. Yeah.
Charles W. 'Chuck' Bryant
It was just sugar stick dip in sugar.
Josh Clark
Right. Like, I don't have a foot, but I've got my Lick a Maid.
Charles W. 'Chuck' Bryant
Oh, man.
Josh Clark
Can you. Can you guys out there in podcast land tell we're stalling? Because we are big time. Because we happen upon a topic that no one really knows what's What? Yeah, I mean, we're talking about fever dreams. We know about fevers.
Charles W. 'Chuck' Bryant
Yep.
Josh Clark
Kind of know about dreams.
Charles W. 'Chuck' Bryant
Yeah.
Josh Clark
But apparently no one's really gotten to work on figuring out what fever dreams themselves are, so it's largely anecdotal.
Charles W. 'Chuck' Bryant
Yeah.
Josh Clark
So you're going to have to bear with us on this.
Charles W. 'Chuck' Bryant
We'll leave it there. We'll leave that there for now.
Josh Clark
Yeah.
Charles W. 'Chuck' Bryant
But I guess a good place to start is by talking about both those things separately and starting with fevers. You know, you've always heard 98.6 Fahrenheit is the normal internal body temperature of a human. That in 92, there was a big study that said it's really 98.2. What? Depending on, like, how old you are, what time of day it is, what you're doing, where you. If you put it in your butt or under your armpit or in your mouth or in your ear or all of them at once, that'd be something else. It can vary a little bit. So I think there's a bit of a slight sliding scale to that number.
Josh Clark
Yeah, for sure. But I think the key is it's gonna be roughly around there. And even if you have an average body temperature that's not exactly 98.6, let's say you typically tend toward 97.5.
Charles W. 'Chuck' Bryant
You run cooler. Yeah.
Josh Clark
Your body temperature's still, during the average day, gonna fluctuate plus or minus about a degree Fahrenheit either way.
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Yeah.
Charles W. 'Chuck' Bryant
So I looked a little bit into the 98.6, and the original dude that came up with that was a German physician named Carl Reinhold August von de Lich.
Josh Clark
That was good.
Charles W. 'Chuck' Bryant
That's a good one.
Josh Clark
When?
Charles W. 'Chuck' Bryant
1868, he wrote a book. Well, he did his studies where he had this temperature rod he would stick under the armpits of all these people.
Josh Clark
He's like, where do you want it?
Charles W. 'Chuck' Bryant
Yeah, exactly. And everyone once said everyone always says armpits. You know the comedian Rory Scovel?
Josh Clark
No.
Charles W. 'Chuck' Bryant
You should just check him out.
Josh Clark
Okay.
Charles W. 'Chuck' Bryant
He does these weird things, like, he'll just do his whole routine with a German accent, like, for no reason whatsoever.
Josh Clark
I like the sound of that.
Charles W. 'Chuck' Bryant
And he did one about stealing old people, like kidnapping old people with a German accent. He's from South Carolina, I think, but he's done shows with, like, a severe Southern accent and then one just normal accent. And then he'll do a German thing.
Josh Clark
He just likes to mess with people, I guess.
Charles W. 'Chuck' Bryant
So he's great.
Josh Clark
I will check him out. Thanks, man.
Charles W. 'Chuck' Bryant
He's one of my favorites. So, anyway, 1868, he wrote a book called, after these experiments called Dos verhalten der Ergenformer and Krankenheitn.
Josh Clark
That is good.
Charles W. 'Chuck' Bryant
And I looked. It's funny. The real translation I think of that is on the temperature in diseases. But if you type it into Google Translate, it comes out as the behavior of the Intrinsically warm in Sick units.
Josh Clark
That's the subtitle.
Charles W. 'Chuck' Bryant
Yeah. So anyway, he's a guy that came up in 98.6, and that stood for a long time.
Josh Clark
But that's just. So that was just based on his observations, his study, and it stuck.
Charles W. 'Chuck' Bryant
It was an average. It wasn't like, this is what you should be. It was just the average of all these people.
Josh Clark
Right. And then 130 years later, we finally got around to verifying whether that was actually true or not.
Charles W. 'Chuck' Bryant
Well, I mean, it says in 92 that they said it was 98.2 from another study, but then everything I still read says 98.6.
Josh Clark
All right, I know what you're talking about, though. I had heard in the last few years that they're like that. 98.6 Jazz is kind of made up.
Charles W. 'Chuck' Bryant
Right.
Josh Clark
So the point is, is that your body's going to be roughly somewhere around there, right? That's your normal body temperature.
Charles W. 'Chuck' Bryant
Yes.
Josh Clark
And then depending on the time of day, it's either going to be a little cooler than that or a little warmer than that.
Charles W. 'Chuck' Bryant
Yeah.
Josh Clark
And our body temperature is regulated by something called the hypothalamus. And like I said, depending on the time of day, your body temperature is going to fluctuate. And that's tied to sleep, apparently. So as your body temperature is rising, usually in the late afternoon is about where it peaks during the day. That's associated with wakefulness, alertness. Not necessarily just having a high body temperature, but an incline in the temperature in your body means you're awake, you're alert, you're ready to go. Right?
Charles W. 'Chuck' Bryant
Yeah. Ready for action.
Josh Clark
Once it starts to decline, that's associated with drowsiness and it hits its trough. Your body temperature is at its lowest Right about before you wake up.
Charles W. 'Chuck' Bryant
Right.
Josh Clark
And that's actually associated with REM sleep. So there are some stuff starting to come out. Just bear with us, everybody.
Charles W. 'Chuck' Bryant
We're laying the groundwork.
Josh Clark
So your body temperature changes. The hypothalamus is directing the whole thing. And sleep and wakefulness has something to do. It's related to your body temperature changes. All right, good night. You take it from here.
Charles W. 'Chuck' Bryant
Well, you know what? Let's take a break because.
Josh Clark
Okay.
Charles W. 'Chuck' Bryant
I'm not sure where I should go. We'll be right back.
Josh Clark
Oh,
Chuck Bryant
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Josh Clark
Yeah.
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Charles W. 'Chuck' Bryant
Okay, I was being coyote. You set the stage very nicely. Okay, so if your body gets, let's say, some bad bacteria gets in it.
Josh Clark
Yeah.
Charles W. 'Chuck' Bryant
And your body is alerted, Warning, intruder is coming. Your immune system kicks into gear and starts producing this biochemical material called a pyrogen.
Josh Clark
Okay, this is my new favorite thing the body does.
Charles W. 'Chuck' Bryant
Oh, yeah.
Josh Clark
Yeah.
Charles W. 'Chuck' Bryant
Well, you knew that before, right? Or did you just not know the mechanism?
Josh Clark
I mean, I knew humans get fevers, and I knew the fever was to kind of like cook out everything. I didn't understand the mechanism, I guess, to answer your question.
Charles W. 'Chuck' Bryant
Well, take this part then.
Josh Clark
Oh, yeah. Can I?
Charles W. 'Chuck' Bryant
Yeah.
Josh Clark
So these pyrogens, right, they are these biochemical markers that are released by the immune system in the body.
Charles W. 'Chuck' Bryant
Yeah.
Advertisement Voice 2
Or.
Josh Clark
And this is why I love this, there's some bacteria, some pathogens that make humans sick that produce pyrogens naturally.
Charles W. 'Chuck' Bryant
Yeah.
Josh Clark
So when they show up, they just start releasing them and they just give themselves away.
Charles W. 'Chuck' Bryant
Yeah, they're big dummies in that way.
Josh Clark
Right. They're like, hey, where's the party? They kick open the door, they're carrying, like a pony keg under one arm, their gut's sticking out. It's just that's like that kind of bacteria. Right. So the pyrogens enter the bloodstream and they travel to the hypothalamus. Because, remember, the hypothalamus controls your body temperature. And this is what they do. Chuck, are you ready for what the pyrogens do?
Charles W. 'Chuck' Bryant
Yes.
Josh Clark
They go to your hypothalamus and they dampen the heat sensing neurons in the hypothalamus and they excite the cold sensing neurons in your hypothalamus and they trick your hypothalamus into thinking your body's suddenly gotten very, very cold so that your hypothalamus turns the temperature up and says, don't let any of this heat out. We got to warm back up. It tricks your body, your hypothalamus, into creating a fever.
Chuck Bryant
That's right.
Charles W. 'Chuck' Bryant
And they do this because. Well, they don't do this because. But what happens from there? They do this because they're dumb. But what happens from there is, like you said, the fever, what a fever is and why you want that fever for at least a little while. Fever that it does, it's trying to cook and burn and bake that bacteria until it dies. It is your body fighting. Like when you hear your fever broke, that's usually a good sign. That means that your fever did its job and it's cooked all that bacteria up and you're going to be on the mend soon.
Josh Clark
Yeah.
Charles W. 'Chuck' Bryant
So basically that's what's happening. And this is the great thing about a fever. But you know, fever makes you feel like crap because it's a lot of hard work to kill all those things.
Josh Clark
Well, it is. There's a lot of. Your sympathetic nervous system is kicked into high gear, which I found out is one reason why they say you want to feed a cold, starve a fever, because you don't want to introduce digestion because it requires the parasympathetic nervous system. Right. Fight or flight. And you don't want those two things going on while your body has a fever. It's just a lot of extra work for it. Right. But one of the. One of the things that is going on when your body has a fever, when that temperature rises, it's hard enough on your organs, but it's also hard on the level. Just the fact that they're operating outside of their normal operating temperature.
Charles W. 'Chuck' Bryant
Yeah.
Josh Clark
And that makes it very hard on them and can actually cook some of the ingredients inside your cells.
Charles W. 'Chuck' Bryant
Yeah. I mean, it's like working in a too hot of an environment. It's just. Cause it's never fun for anyone.
Josh Clark
Right.
Charles W. 'Chuck' Bryant
Although I guess some people love that stuff.
Josh Clark
Yeah. But they might like it, but they still aren't working fast.
Charles W. 'Chuck' Bryant
Yeah, that's true.
Josh Clark
You know, they might be happy, but they're slow.
Charles W. 'Chuck' Bryant
So if you have a fever, what's considered a Fever now in 2017, if you're an adult and your oral temperature is above 100.4, or if your rectal or ear temperature is above 101 and that's considered a fever. If you're a kid, good luck getting anything besides the rectal temperature because it's just tough.
Josh Clark
You have basically no. Right.
Charles W. 'Chuck' Bryant
Well, what you have is wiggly kids who aren't like, sure, stick something in my ear for four seconds. Yeah, but up the kazoo. There's not really anything they can do about that.
Josh Clark
All they can do is say glavin.
Charles W. 'Chuck' Bryant
Yeah, exactly. So the rectal temperature for a kid above 100.4. And with adults, you don't have to really worry about your fever too much. If it tops 105 for any period of time, you probably want to do something about that.
Josh Clark
That's what I saw was the 105 degree Fahrenheit mark was about where you should start to worry.
Charles W. 'Chuck' Bryant
Yeah. As an adult. And you're going to feel so awful if Your temperature is 105. You've probably already been to a doctor at that point.
Josh Clark
Let's hope so.
Charles W. 'Chuck' Bryant
For kids it's different though. If you don't want to let your child get up to 105, that's bad, bad, bad.
Josh Clark
So what is it for kids that you really want to start worrying about?
Charles W. 'Chuck' Bryant
Did you say, you know what? I'm not exactly sure.
Josh Clark
I mean, it probably depends on whether you're a first time parent or this is your second or third kid.
Charles W. 'Chuck' Bryant
Well, and it varies with the age. You know, it's like 0 to 18 months. It's something.
Josh Clark
I gotcha.
Charles W. 'Chuck' Bryant
Like what you should do is go consult your doctor. Yeah, exactly. But you know, any kind of temperature you should for a child, you should kind of be a little more alert about. Right, but we're not medical experts here.
Josh Clark
No, we're not. And everything we're saying assumes that you have healthcare coverage.
Charles W. 'Chuck' Bryant
That's right. All right, so that's fever in general. You got anything else on that?
Josh Clark
Yeah, one other thing. The pyrogens.
Charles W. 'Chuck' Bryant
Pyro. By the way, it's no mistake, man.
Josh Clark
I did have something.
Charles W. 'Chuck' Bryant
No coincidence.
Josh Clark
No, it's not. What is it? Latin for fire. Greek word for fire.
Charles W. 'Chuck' Bryant
Yeah.
Josh Clark
Pyro. Eat Def Leppard. Right.
Charles W. 'Chuck' Bryant
Great song.
Josh Clark
It really is a whole album, right? Yeah. They just mention it in Rock of Ages. It comes up.
Charles W. 'Chuck' Bryant
They should have a song called Pyromania.
Josh Clark
But that's pretty cool. It's like the antithesis of your band, your album and your song all being the same name. Like Big Country.
Charles W. 'Chuck' Bryant
Oh, I love that song.
Josh Clark
Sure. But it's pretty uncreative. You're basically saying, like, here's our basket and we're gonna put every egg we have into it. That's the one thing we came up with. Yeah. I saw a David Spade bit once and he was talking about. He was complaining it wasn't even comedy. He was just complaining that he went and saw a Big country and they didn't play the song Big Country. No. Yeah.
Chuck Bryant
Really?
Josh Clark
He's like, it's the name of your band. It's the one song everybody came to see and they didn't play it.
Charles W. 'Chuck' Bryant
He's funny too.
Josh Clark
Well, the long and short of it is I totally forgot what the other thing I had to say about pyrogens was, so I'll probably think of it. Oh, I know what it was. Pyrogens. As your immune system grows and ages and you become a grown up, the pyrogens have a little less of an effect on you. So where. If you're a kid and your immune system is young and inexperienced, your fever's gonna shoot up quick and it's gonna get hotter faster. So you do wanna stay on top of a kid's fever because their immune system is not used to pyrogens coming and messing with their hypothalamus. Like in adults. It is.
Charles W. 'Chuck' Bryant
Yeah. It'll spike much faster. That's a good point.
Josh Clark
That's what I was trying to think of.
Charles W. 'Chuck' Bryant
Yeah, that's true. You need to take that. Need to take that rectal temperature way more than you're comfortable with.
Josh Clark
I don't recall that ever having been done to me.
Charles W. 'Chuck' Bryant
Well, because you don't remember being a baby.
Josh Clark
No, but my parents were pretty strict. Pretty stern.
Charles W. 'Chuck' Bryant
No, by the time a kid is old enough to where you can say like, hey, put this under your tongue, or hold still for a minute while I put this in your ear. Yeah, but pre that, when they're not sentient humans and they're just, you know, crying, whiny little sacks of flesh, I gotcha. You gotta stick it right up the butt.
Josh Clark
Okay.
Charles W. 'Chuck' Bryant
Carrie's laughing.
Josh Clark
She almost spit out her shawarma salad.
Charles W. 'Chuck' Bryant
Carrie's done plenty of that, so she knows. Okay, so into dreams. I always think we've done a general show on dreams.
Josh Clark
I think we did. Finally.
Charles W. 'Chuck' Bryant
I didn't find it.
Josh Clark
What? Still no.
Charles W. 'Chuck' Bryant
I saw lucid dreaming. Can you control your dreams.
Josh Clark
That's the same thing, wasn't it? I think that was the same episode. But no, we did one on dreams.
Charles W. 'Chuck' Bryant
I didn't see it.
Josh Clark
Wow. I can't believe it. I can't believe it. Well, this contributes to the.
Charles W. 'Chuck' Bryant
Little by little, someone will know. Okay, Jill Hurley, where are you when we need you? Our statistician, Minister of stats. Right. All right, well, we'll talk about dreams a bit here then. Even though we've explained this in various episodes here and there to some degree. But dreams. You know, if you're a psychologist, you really love to spend time talking and dissecting dreams, interpreting dreams. If you're a more into the neurology side of science, you don't really care about that kind of stuff. In fact, for many years they thought it was called activation synthesis hypothesis, which was you go to sleep and all these synapses are just randomly firing and they don't really add up to even a story. You just do that when you wake up because you're human. Yeah, but I mean, that's complete bs.
Josh Clark
Well, you almost get the impression that they came up with this and the neurologists came up with it to stake out their territory in response to years of psychoanalysts saying, this is what dreams are. They're like tapping into the collective unconscious or your repressed memories. Neuroscience said no, nothing. Yeah, they're just your stupid wet brain going crazy while you sleep.
Charles W. 'Chuck' Bryant
Yeah. Which we all know now is not true.
Josh Clark
I saw another one too.
Charles W. 'Chuck' Bryant
What's that?
Josh Clark
Threat simulation theory. Have you heard of that one?
Charles W. 'Chuck' Bryant
No, but that's a great band name.
Josh Clark
Basically, it's you're training to be a ninja while you sleep. Like your brain is running threat simulations constantly, so that it's like working itself out. Like getting more and more agile and quick. And so you can get better at running from a saber toothed tiger if you actually encounter it.
Charles W. 'Chuck' Bryant
I could see that early on, maybe.
Josh Clark
Sure. And there is an evolutionary advantage to it, so evolutionarily speaking, it would make sense. The point is that one came along and was like, no, there's obviously some reason for dreams. It's not just random.
Charles W. 'Chuck' Bryant
Yeah, well, and then maybe I could have seen that early on, but then at some point, someone around the fire had a dream about Tuk Tuk's wife and woke up and went, whoa, there was no saber toothed tiger in that dream. I'm not sure what that meant,
Chuck Bryant
but
Charles W. 'Chuck' Bryant
I better not tell Tuk Tuk.
Josh Clark
And then they went, what's a rectal Thermometer, it hasn't even been invented yet.
Charles W. 'Chuck' Bryant
So these days they've done actual studies with EEG machines and MRI machines. And especially in Italy, these Italian researchers basically put people to sleep, not put
Josh Clark
them to sleep in a sleeper hole.
Charles W. 'Chuck' Bryant
They lay them down in a nice Italian bed, feed them some pasta fazul,
Josh Clark
get out the rectal thermometer.
Charles W. 'Chuck' Bryant
Yep. And they hook them up to all these wires and machines and then they will wake them up at different points in the night and say, hey, what were you dreaming of? We'd like to talk about it and study what was going on with these machines.
Josh Clark
Right. And they actually, what they found supports the current, the prevailing theory. I don't think it was their theory, I think it was around, but their research supports it called affect regulation theory, which is basically that we control our emotions or we process our emotions through our dreams.
Charles W. 'Chuck' Bryant
Yeah.
Josh Clark
And these Italians found support for this in that when they woke people up and asked them what they were dreaming about, the ones who had the best recall were the ones who had the most theta waves in their frontal lobes.
Charles W. 'Chuck' Bryant
Right. Which are slow moving waves. Right.
Advertisement Voice 2
Yes.
Josh Clark
And when you look at an EEG machine, if you looked at those dreamers brainwaves, it looked like the brain waves of somebody who was sitting there forming and recalling memories.
Charles W. 'Chuck' Bryant
Right.
Josh Clark
So these people said that's what they're doing. That's what all of us are doing. While we're dreaming, we're forming memories, we're taking emotions that we've experienced through the day and we're creating memories out of them so we can file them away. So we're processing our emotions in our dreams. That's the point of dreams. That's the current understanding.
Charles W. 'Chuck' Bryant
Yeah. And then, I mean, other parts of the brain that have been active all sort of deal with emotion, whether it's the amygdala and the hippocampus or the lingual gyrus, which I think we just talked about that in another episode.
Josh Clark
I don't recall, can't remember.
Charles W. 'Chuck' Bryant
But they're all areas of the brain that relate to emotion and memory and some with visual activity and. But you know, that kind of makes sense. I like that theory.
Josh Clark
Yeah. And then under that current theory. So that's like the explanation for regular dreams. And you can't just have a theory for dreams without including nightmares or else your theory's broken. Right, Right. So the affect regulation theory considers nightmares. Basically. It's an emotion that's being put into the process of being, of creating a memory, a false memory. Right. A Dream memory, I guess you'd put it. But it's a real emotion, right? And it's so big, it breaks the process. And all of a sudden, this process of creating a fake memory, a fake experience goes haywire. And now all of a sudden you're enduring some terrible, horrifying experience because the emotion that was being processed was too big and got out of control. And now you have a nightmare ts for you.
Charles W. 'Chuck' Bryant
Yeah, I think we did one in night terrors, right?
Josh Clark
We did for sure. And sleep paralysis.
Charles W. 'Chuck' Bryant
We've covered it all, I think.
Josh Clark
I guess we really haven't done a dreams one.
Charles W. 'Chuck' Bryant
All right, so let's take another break. We're going to come back and finally talk about fever dreams.
Chuck Bryant
Hey, everybody. Home security can be a real headache sometimes. There are expensive monthly fees. There are contracts that lock you in for years and years and system hardware that requires a technician to set up.
Advertisement Voice 2
Yeah, well, welcome to Simplisafe, friend, because they do away with all that stuff.
Chuck Bryant
That's right. You can easily customize the system. That's right for your home@simplisafe.com, it's going to ship right to your door in just a few days. And with their app guided setup and no drilling required, you can install and arm your system in under an hour.
Advertisement Voice 2
Yeah, no need to wait around for a technician appointment. And we're not talking about just cameras. We're talking about what Simplisafe calls a comprehensive ecosystem of sensors, cameras for inside and out and 247 professional monitoring. In the event of a break in fire, flood, SimpliSafe's agents are ready to help you.
Chuck Bryant
That's right. No long term contracts, affordable pricing and proven trust. Over 5 million people trust Simplisafe every day. And right now you can get 50% off your new system by visiting simplisafe.com stuff. That's half off@simplisafe.com stuff. There's no safe like SimpliSafe. Hey, everybody. Support for the show today comes from public. So it kind of feels like there's two types of investing platforms. You've got the old school brokerages that look like they were designed in like 1995. And then you have those other platforms, you know, the ones that feel less like investing and more like a casino.
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Chuck Bryant
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Charles W. 'Chuck' Bryant
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Chuck Bryant
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Charles W. 'Chuck' Bryant
Joshua,
Josh Clark
You robbed me of a Saturday Night Fever reference. I just want to go on record
Charles W. 'Chuck' Bryant
as saying that I was wrong.
Josh Clark
So, Chuck, here's where everything just kind of goes totally off the rails. We've talked about fevers, we've talked about nightmares. The problem is really understanding both doesn't necessarily amount to understanding them together.
Charles W. 'Chuck' Bryant
Right.
Josh Clark
So knowing what fevers are, knowing what dreams are, doesn't mean you know what fever dreams are. But you can make stuff up if you want.
Charles W. 'Chuck' Bryant
Yeah. And boy, I don't even think we even said if you've never had a fever dream, you might even know what we're talking about.
Josh Clark
Oh yeah.
Charles W. 'Chuck' Bryant
Feel kind of dumb at this point in the podcast, but the fever dream is basically a nightmare on steroids.
Josh Clark
Yeah.
Charles W. 'Chuck' Bryant
It's just so vivid and so real and scary. Right. That happens when you are sick with a fever. Yes, obviously.
Josh Clark
So they're fever dreams. Right? So they are a thing.
Charles W. 'Chuck' Bryant
Yeah.
Josh Clark
But the scientific literature on them is super thin. Basically non existent.
Charles W. 'Chuck' Bryant
Kids seem to get Them, if not more, at least they stand out more to children. And so anecdotally, people seem to recall having fever dreams more when they were kids. Whether or not that's true or just a baby memory is, or, you know, what do you call it? Like a memory bias or whatever? Yeah, no one really knows.
Josh Clark
Yeah, well, yeah, I mean, we don't really know because I don't remember the
Charles W. 'Chuck' Bryant
last time I had a fever and if I did, whether or not I had a fever dream.
Josh Clark
I don't think I've ever had a fever dream.
Charles W. 'Chuck' Bryant
I did when I was a kid.
Josh Clark
I don't remember having fever dreams.
Charles W. 'Chuck' Bryant
Yeah, I remember being sick as a kid and having like nightmares when I was sick.
Josh Clark
So, like, they're noticeably worse than your average nightmare.
Charles W. 'Chuck' Bryant
Yes.
Josh Clark
Really? So would you keep waking up from
Advertisement Voice 2
them
Charles W. 'Chuck' Bryant
that I don't remember?
Josh Clark
See, that's a big question to me. Well, let's talk about the anecdotal theory of what is behind fever dreams.
Advertisement Voice 2
Right.
Charles W. 'Chuck' Bryant
Okay.
Josh Clark
So when your body's undergoing a fever, we said that your body's not functioning at its top performance.
Charles W. 'Chuck' Bryant
No.
Josh Clark
And that includes the brain. The brain itself is an extremely special organ, if you didn't know already. It's like, I think 2% of the body's mass, but it requires 20% of the body's energy.
Charles W. 'Chuck' Bryant
Yeah. And the neurons, compared to regular old dumb cells, they burn or they need about between 320500 times more energy than a regular old dumb cell in your body.
Josh Clark
Right. And so when all these chemical processes, when all of this energy is being exploited to power cells, it produces the byproduct of heat.
Charles W. 'Chuck' Bryant
Yeah.
Josh Clark
So the brain is super sensitive to overheating. Right. Already just under normal circumstances.
Charles W. 'Chuck' Bryant
Yeah. And it's generally taken care of by your body. Like, as you know, it's cooled down.
Josh Clark
Right.
Chuck Bryant
And regulated.
Josh Clark
Right. So if you have a fever and your brain is not operating at optimal conditions, but you're asleep, so it's trying to go through its normal processes. If you have a nightmare, it's entirely possible that that nightmare is going to be far, far worse because the normal processes have broken down. Or it's even further possible. Apparently the amygdala is frequently implicated with nightmares because it has to do with being terrified or angry or fearful. The amygdala might be functioning at an abnormal level and is just basically going haywire while you have a fever.
Charles W. 'Chuck' Bryant
Yeah. And then the fact that most dreams occur during REM sleep, and I think that's when you're body is warmest during sleep anyway. Right.
Josh Clark
That's when. See, this is where it all gets kind of hinky. During REM sleep, your hypothalamus says, I'm done. I'm not working right now. So it stops regulating temperature. Which is usually why your body temperature is lowest right before you wake up.
Charles W. 'Chuck' Bryant
Oh, I thought it was highest right before you wake up.
Josh Clark
No, it's highest in the afternoon while you're awake. It's lowest right before you wake up.
Charles W. 'Chuck' Bryant
I feel like I always wake up hot.
Josh Clark
I mean, you may be like sleeping with too many blankets. Your room might be a little too warm. Huh.
Charles W. 'Chuck' Bryant
Or maybe it's my stupid schedule of my ac.
Josh Clark
I mean, it could be.
Charles W. 'Chuck' Bryant
It might have cut off a couple hours before or something.
Josh Clark
Right? It could be. Right.
Charles W. 'Chuck' Bryant
Fires up after I get up.
Josh Clark
Because supposedly when you are sleeping and you're in REM sleep, your hypothalamus is not regulating temperature during that period. So if you are already hot. And remember, high body temperature is associated with wakefulness, then maybe you are waking up more frequently than you normally would. And when you wake up in the middle of a dream, you're more prone to remember it. If you wake up in the middle of a nightmare, it's going to seem even worse than one that you had and woke up normally from.
Charles W. 'Chuck' Bryant
Yeah, I mean, I had a series of. Not nightmares last night, but just sort of anxiety dreams. And I don't have any anxiety about anything right now. I think it was just after reading all this stuff.
Josh Clark
Oh, yeah.
Charles W. 'Chuck' Bryant
I'm just suggestible.
Josh Clark
You had anxiety dreams?
Charles W. 'Chuck' Bryant
Yeah. But not about, like, nothing specific. No, like there's. You know, usually if I have anxiety dreams, I'm just like, because something's going on in my life, I'm anxious about it.
Josh Clark
Sure. Yeah.
Charles W. 'Chuck' Bryant
But I'm.
Josh Clark
It was just the research. Huh?
Charles W. 'Chuck' Bryant
I think so.
Josh Clark
Man, you're a dedicated.
Charles W. 'Chuck' Bryant
But there are also celebrity dreams because, you know, I've talked about those before.
Advertisement Voice 2
No.
Charles W. 'Chuck' Bryant
Yeah, yeah. That I have just celebrity dreams all the time, but they're just very normal. That I'm just like friends with celebrity people.
Josh Clark
But were they anxiety ridden last night?
Charles W. 'Chuck' Bryant
Yes. Like I was hanging out with the band Luna.
Josh Clark
Okay.
Charles W. 'Chuck' Bryant
Dean Wareham of Luna.
Josh Clark
All right.
Charles W. 'Chuck' Bryant
And there was. But there was. I can't remember exactly what was going on, but you know, there was anxiety involved. Like I was trying to get somewhere and couldn't get there. Like the typical stupid dream stuff.
Josh Clark
Gotcha.
Charles W. 'Chuck' Bryant
You know?
Josh Clark
Yeah.
Charles W. 'Chuck' Bryant
But some dean was in there somehow.
Josh Clark
Yeah. Have you talked to him today?
Charles W. 'Chuck' Bryant
I don't Know him. But I think I know why they were in there. That's all I'll say.
Josh Clark
Oh, okay. Wink, wink.
Charles W. 'Chuck' Bryant
I guess. So. Here's another thing that was in our own article I thought was interesting. Just a little tidbit was that some recreational drugs like meth and ecstasy can raise brain temperatures. That is one of the reasons they think that it like kills so many brain cells when you do those drugs.
Josh Clark
Yeah. Supposedly you're not supposed to take ecstasy in warm climates.
Charles W. 'Chuck' Bryant
Yeah, Never have heard that.
Josh Clark
Yeah, just Norway.
Charles W. 'Chuck' Bryant
Well, there you have it.
Josh Clark
Only it's Svalbard.
Charles W. 'Chuck' Bryant
What else? Is there anything else in here?
Josh Clark
No. Man, I can't believe we stretched this one out as far as we did.
Charles W. 'Chuck' Bryant
Alrighty.
Josh Clark
We never have to talk about fever dreams again, Chuck.
Charles W. 'Chuck' Bryant
Good.
Josh Clark
If you want to know more about fever dreams, well, you might as well start@howstuffworks.com. there's nothing wrong with that. And you can also just go around and look at how sparse the research is on the Internet for yourself. And if you are a researcher and you know more stuff about fever dreams that you can point us to, let us know.
Charles W. 'Chuck' Bryant
Yeah.
Josh Clark
In the meantime, I think I said search bar somewhere in there. Which means it's time for listeners.
Charles W. 'Chuck' Bryant
You know what? I think another reason the anxiety dreams is because I'm barreling through the season of Fargo, the third season. Yeah. And the two episodes I watched last night, which I believe were, if there are 10, I think it was eight and nine were both just like ratcheted up with tension.
Josh Clark
I'm sure that's what it was.
Charles W. 'Chuck' Bryant
And I think that probably had be to something to do with it.
Josh Clark
That happens to me sometimes. I'll be watching something and I won't realize how on top of me it's gotten. And then all of a sudden like it goes to an ad and I'm like really uptight about like this scratch and dent washing machine sale that's going on somewhere. And I don't understand why. And I'm like, oh, wow, that TV show really got to me.
Charles W. 'Chuck' Bryant
Yeah, I think. I think Fargo had something to do with it.
Josh Clark
I think you may have nailed it.
Charles W. 'Chuck' Bryant
All right, I'm gonna call this one garden variety fan mail. Which we don't really a lot of these.
Josh Clark
So I'm going to dig in.
Charles W. 'Chuck' Bryant
Hey, guys. That's all this is, fan mail. You guys are doing a great job. Always have. It's clear that with every episode you take great pains to provide the most accurate information you can in the most thoughtful way possible.
Josh Clark
How ironic that you would read this on the Fever Dreams episode.
Charles W. 'Chuck' Bryant
This has never been more evident to me than in the episodes you did on puberty. I know it's been a little while since these came out, but just listen to them. And it's was touching to see how frequently you tried to reassure young listeners what they're experiencing is normal and that there was nothing wrong about what was happening. To hear two grown men do their best to talk to young boys and girls about such sensitive material was a pleasure. Yes, at times I could practically feel you nervously twitching while trying to discuss menstruation in an informative yet reassuring way, but it was absolutely charming. Just reaffirm what we've always known. You two are just a pair of great dudes. Oh, that's nice.
Josh Clark
Yeah, I like this guy.
Charles W. 'Chuck' Bryant
I've only been listening for a few years, but I'm a lifetime fan now. If you're keeping count. Like to put in a vote for D.C. for live shows. Josh. E, D, G, E, E. Sorry, E,
Josh Clark
D, G, E is edge.
Charles W. 'Chuck' Bryant
And then Ed. 2 L's. Edgel.
Josh Clark
Edgel, sure, yeah.
Charles W. 'Chuck' Bryant
Joss. Edgell or Edgelli.
Josh Clark
I like Edgell.
Charles W. 'Chuck' Bryant
Or Edgill or Edgar.
Josh Clark
Oh, I think Edgell. Edgell sounds like a kid next door. Josh. Edgel.
Charles W. 'Chuck' Bryant
It's Josh and Josh. You know what, we usually come to D.C. once a year. I don't think we're coming this year, though.
Josh Clark
No, we probably will be there early. Ish. 2018.
Charles W. 'Chuck' Bryant
Yeah, DC's always great to us. So we'll definitely be back.
Josh Clark
Yeah.
Charles W. 'Chuck' Bryant
Soonish.
Josh Clark
Yeah. And you can always fly somewhere in the continental United States or Canada.
Charles W. 'Chuck' Bryant
Josh, take that Acela Express up to Brooklyn.
Josh Clark
Exactly.
Charles W. 'Chuck' Bryant
That's a pleasure train.
Josh Clark
There you go. There's rectal thermometers everywhere. And if you want to get in touch with us, you can send us both. And Jerry, an email to stuff podcast@iheartradio.com
Narrator
Stuff youf Should Know is a production of iHeartRadio. For more podcast podcasts, My Heart Radio, visit the iHeartRadio app. Apple Podcasts are wherever you listen to your favorite shows.
Chuck Bryant
Hey, everybody. Home security can be a real headache sometimes. There are expensive monthly fees. There are contracts that lock you in for years and years and system hardware that requires a technician to set up.
Advertisement Voice 2
Yeah, well, welcome to SimpliSafe, friend, because they do away with all that stuff.
Charles W. 'Chuck' Bryant
That's right.
Chuck Bryant
You can easily customize a system that's right for your home@simplisafe.com, it's going to ship right to your door in just a few days. And with their app guided setup and no drilling required, you can install and arm your system in under an hour.
Advertisement Voice 2
Yeah, no need to wait around for a technician appointment. And we're not talking about just cameras. We're Talking about what SimpliSafe calls a comprehensive ecosystem of sensors, cameras for inside and out and 24,7 professional monitoring in the event of a break in fire, flood. Simplisafe's agents are ready to help you.
Chuck Bryant
That's right. No long term contracts, affordable pricing and proven trust. Over 5 million people trust SimpliSafe every day. And right now you can get 50% off your new system by visiting simplisafe.com stuff that's half off at simplisafe.com stuff there's no safe like SimpliSafe. Here's a paradox. We buy insurance for peace of mind. Yet the very policies you trust can deliver the biggest financial shocks. Across America. Millions of claims are denied every year, not because people did anything wrong, but because their policies quietly excluded the thing that happened.
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Josh Clark
EVs on the road, which makes the
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Narrator
is an iHeart podcast guaranteed human.
Release Date: April 25, 2026
Hosts: Josh Clark & Charles W. "Chuck" Bryant
Podcast: Stuff You Should Know (iHeartPodcasts)
This classic SYSK episode revisits a fascinating topic: fever dreams. Josh and Chuck explore the intersection of fevers, dreaming, and why the combination creates such vivid, bizarre, and often disturbing nocturnal experiences. The hosts break down what is known — and unknown — about fevers, dreams, and how they collide, while maintaining their signature mix of humor, anecdotes, and nerdy tangents.
Theme (01:12–01:40): Understanding fever dreams: why they happen, what we know from science, and what’s mostly still a mystery.
(Starts at 05:36)
Body Temperature Isn’t Universal:
Hypothalamus as Crucial Regulator:
(14:15–22:30)
Immune Response and Pyrogens:
Purpose & Risk of Fever:
Why Not to “Starve a Fever”:
(22:30–29:04)
Dream Theories: From Synapse Fireworks to Emotional Processing:
Dreaming Brain Areas: Amygdala, hippocampus, lingual gyrus — all parts involved in emotion and memory light up during dreaming. (27:18–27:34)
(32:20–39:23)
Bridge Between Fever and Dreams Is Uncharted:
What Are Fever Dreams?:
Theories on Why Fever Dreams Are So Intense:
Anecdotes and Self-Reflection:
(38:48–39:23)
In this deep dive, Josh and Chuck demystify what science knows about fever dreams and what remains speculation. The result is a blend of biology, psychology, and humorous asides—typical SYSK style. The main takeaway: fever dreams are a real, memorable phenomenon, but remain a mystery ripe for further exploration.
If you’ve ever had a surreal, anxiety-fueled dream while sick — you’re not alone. Why it happens? The science is still catching up.
For further research, check:
End of episode summary.