Why Your Brain Blinds You For 2 Hours Every Day

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Sources & further reading:

Reality is not real. Your world is a prediction. Every sight, sound, and touch you experience is the result of calculations your brain makes before reality even reaches you. It fills in gaps, fabricates details, and even alters time itself so you feel like you’re in control. But if everything you know is an illusion… what does that say about you? What does it mean for your choices? Is there even free will?

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[kurzgesagt]

This video was sponsored by Brilliant. Thanks a lot for the support!

[QDWhite]

My 6yo asked me to show him videos of "birds talking about dangerous things". Took me a second to realize he meant he wanted to watch this channel.

[GambitsEnd]

Part of the reason practice is so important. It not only trains "muscle memory", but it gives a larger dataset for your brain to base decisions on.

[frankmc]

It's so weird to see a Kurzgesagt video on a subject I'm an expert in...

Which is to say, all that stuff they say about how the brain controls your muscles for walking is actually more complicated than that. In reality, those automatic systems that catch you when you trip on the banana peel never shut off. They're always on, and your brain is constantly monitoring and selectively suppressing them to coordinate even normal walking.

Without your brain those systems will keep running on their own to a degree independent even of what your inner ear is doing. We've stimulated these systems in people with spinal cord injury, and they can still control their muscles to help maintain balance with no connection to the brain at all. This is a big reason why you don't look at your feet yet can still walk.

That system is itself a set of massive electrochemical subsystems that interact and collectively stimulate each other in a way that, if we dedicate hundreds of computer hours to it, we can just barely understand a system of two muscles.

Oh, and if we independently optimize the way those muscles contract to spend as little energy as possible walking, again blowing hundreds of computation hours on simplified models that still make very large equations, we wind up with...the exact same results as we get doing motion capture on healthy people walking. That's right, your brain is solving massive multidimensional partial differential equations, and it's doing it OPTIMALLY, under UNCERTAINTY, in FACTIONS OF A SECOND.

The brain is nuts. Any time someone wants to come out and say that artificial neural networks come remotely close to replicating what the human brain is capable of, I try to humble them with this knowledge.

[alokeshdas]

So my brain’s just guessing reality? No wonder I walk into rooms and forget why.

[pranavdeshpande]

Nvidia:So we have AI that generates fake frames to smooth things out
Brain: Wait that's my thing

[bakedatbeen]

*Kurzgesagt:* "Do you want to have an existential crisis?"
*Me:* "no?"
*Kurzgesagt:* "Here's one anyway-"

[BadBoy-fgrb]

Gives me an existential crisis - gives me back some hope - doesn't elaborate further - leaves

[oufukubinta]

The part about slipping on the banana peel with the depiction of the preprogrammed sequences was so good

[GigaSimp]

Damn. The quality of this is on another level.

[esparda]

That "brrrrt" got me.
Also, Kurtzegagt is just a league of its own.
The video could have ended at 7 minutes but we get to even deeper stuff.
Excellent takes!

[ComeOnSyntax]

Brain telling me how my brain works and my brain enjoying it

[jonathanrozario]

The most underrated aspect of this channel is its music. The amount of quality is extraordinary and the way it pairs with the narration is genius. Watching this channel with and without earphones is a totally different experience.

[SoaringWings]

Ngl I find this quite comforting. I think that the idea of my conscious self being just one part of an interconnected being, that has other parts that work constantly to support the whole makes me feel less lonely. It’s nice to think of one’s brain as a friend that has been there for you and helps you the best it can your whole life.

[Revenge]

This entire episode felt like watching any number of anime shows, explaining a character's ability to foresee the future or manipulate their body.

Whoever is doing the animation styling decisions, keep it up.

[BartZeal]

I like that I can now say I'm in the past, present, and future whenever someone says I got to live in the now. Got'em!

[tvuser]

The "blind while moving your eyes" thing is noticeable with analog clocks. Ever noticed that when you glance at the clock, sometimes the second-hand seems to be still for 2 seconds before it starts ticking? That's because the brain puts your visual feed on pause while your eyes move, and to prevent you from noticing the blur/blackout it backdates/stretches the videofeed it eventually gets when your eyes arrive and the video feed restarts. That messes a little with your sense of time vs. something as regular as a ticking clock, but that's a sacrifice your brain is willing to make to give you a fake-smooth visual feed.

[LiterallyRyanGosling-pb]

I think most healthy people don't realize how much of their reality is just a construction of the brain, but for people with severe depression and/or PTSD it becomes painfully obvious how much of your world is just an extrapolation of past experiences

[christianna]

I was born with a genetic mutation of one of my pax 6 genes called aniridia. And so essentially that translates from Greek into English that the iris in my eye isn’t formed properly, it’s just a tiny stump, so it looks as if there isn’t one. It is quite rare. Only are the odds. I do not have the small super sharp area of vision in the center of my vision, because I also don’t have a fovea. It’s a bit like seeing everything like the out of focus rim of your peripheral vision, and glasses don’t work either. It does make hand eye coordination and determining how far thing actually are from me quite difficult. I am legally blind or visually impaired. This video has taught me a lot about seeing and not seeing and just how amazing it is to be able to and make subconscious calculations about things that we don’t even understand consciously. Life is so cool. You don’t have to see every thing

[conferzero]

The table tennis example is very interesting! Funny enough, it feels very reminiscent of ‘speculative execution’ in computer science, where a computer can calculate out things before it knows whether they’ll be needed, so that if they are they can be provided without delay. Cool how optimizations in technology and biology tend to rhyme like that!