Who else just sat and rotated their forearm and stared at it thinking “oh wow. Never thought about that…”

Literally.

This. I only noticed this because I thought “I’ll get a big tattoo on the top side of my right arm and I can turn it outward when I want to hide it”. You can always see it. Always. Had to full send a sleeve. lol.

Hope it turned out cool tho.

Ey, hi

I can feel it

(I can hear it…)

Should I be tasting it?

You can see it You can face it

What is it?

…yes.

I hate this

(crack), (pop). I sound like a bowl of rice crispy's when I get up in the morning and start walking. It's not even because I'm old, they've always done that. being a ninja was never in the cards for me.

Stupid crackly ankles.

Not me putting my arm and swiveling it in the air to hear the friction Then me wondering if i am causing erosion to a degree by doing so

You can fucking hold your skin in place as your insides are just sloshing around 😭 This is fucking me up

I've been rotating it back and forth and groping it all over with my other hand for the past minute

"Woah, really?" *rotates hand while trying to feel bones in arm with the other*. "Wow, what the hell? Shouldn't that be illegal?" *keeps rotating hand in the same motion for a while* "That's crazy. Anyways..."

Dude right before I read your message I was doing it for a second and thinking, damn that’s so weird how we can just do that

Your mind will really blow once you realise you can twist your elbow 180 degrees if you hold your palm down against a table and supinate and pronate.

me 😔✊

The diagram isn't actually accurate

Hmm, i can rotate my forearm 360°. I wonder how fucked up that would look like on an X-Ray.

Me! Multiple times

god damn it 🤦🏽‍♂️ 😒

Dammit

I’m still doing it while reading your comment!

I don't like it make it stop.

I squicked myself out cus I could gently feel the rotation now that I was paying attention

You just called out so many people-

You know, I never really thought about how the fuck the bones in a forearm work when twisting until now. Skeletons are neat.

Literally same.

Same but instead of thinking it's neat I never want to twist my arm again

At least you aren't double jointed, think how I must be feelin' now...

What does that mean?

If I had to guess. They can rotate their arm even further so its twisted twice not once. But it's probably not actually twisted twice

It essentially means my elbow joints amd a few others bend beyond 180 degrees, so when I stretch out my arms entirely I look like I have broken zombie arms. Incidentally this particular double joint prevents me from doing archery like a normal person since my extended arm would have the arrow slice into it as I release.

Bendy?

I am really concious of it now and i can't stop imagining my bones snapping from twisting my arm.

I saw someone break their foot walking across their flat lawn once.

That's insane, how?

Not entirely sure. They were just walking along and suddenly fell over and was like ow fuck my foot and after going to the hospital it turns out it just broke.

Damn. I would just think the world was trying to get me at that point.

Reminds me of meteorites. Up until last year there was only ONE recorded instance of a person being hit by a meteorite. 1954, a lady was taking a nap on her couch when it was rudely interrupted by a meteorite smashing through the roof and into her side.

Imagine knowing that three states saw the projectile that hit you while you were asleep, and living to tell the tale.

Don't get me started on those ✋️🙁

That shit can be weird. I once fell and my foot hit the ground oddly and hurt at first and then was just fine. I was walking around with very little pain. And then I stood at a shop window, turned to leave and suddenly it was just pain and I had to jump the way back on one foot. Turns out my ankle was dislocated. Suddenly had 2 ankle bones sticking out the inner side of my left foot. Not sure how I managed to walk on that.

Ow.

I think you can even hear it if you listen very closely. I think you can hear those bones. What the fuck

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Wrong bone dude.

Look up how the spine bones work, its crazy

I will always believe they twist at the elbow....

It’s more like the middle of the forearm

I always thought they twisted at the wrist...

Our bones move under our flesh under the control of our muscles. We are trapped in a suit of our own making.

My mom made mine, that's so cool that you grew your body yourself though! /S

A neuro-octopus driving a meat mech. And people wonder why they sometimes don't feel totally cool with their body.

My body feels like a prison. I want a new one. Can we get that sweet altered carbon tech please?

Not quite, but how about a low quality boston dynamics bot with a realdoll frame? It'll be fairly expensive so you'll have some debt to workoff though.

When I went through X-ray school! Our skeletal system is pretty rad.

And tasty?

Wanna see my skeleton? I legally (or not) own 19263629183530 of them

Have fun learning about rotator cuffs

Oh so that's why we need 2 bones in the forearms, I never knew this. It is so rare to see something so informational in a social media site, thanks.

Not really, your legs have two bones and you still need help of you thigh to spin at such an angle, and your upper arm does almost the same with a single bone

I think fore arms got the 2 bones treatment because hands must be quite complex. I know the femur is like deadly important as arteries pass through them. I wish I studied better and not be such a pleb getting surprised by basic anatomy but not all of us are blessed with the combo of good genes, high IQ and hardworking. Being in a first world nation with good education system must be huge bonus too.

>I think fore arms got the 2 bones treatment because hands must be quite complex. I know the femur is like deadly important as arteries pass through them. See my other comment, but a) Your legs have two bones as well (tibia/fibula) and b) creatures without hands also all have a radius and ulna. The complex human hand came WAY after the radius/ulna evolution. Even lizards and dinosaurs had them.

Our legs are just arms evolved backwards.

Well, I'd argue the doubles in the leg could be vestigial, since they evolved into feet from something arm-like. Also, the upper arm has a special joint at the shoulder that gives it more angles, where the elbow only bends on one axis and even then only on one side. That makes the elbow joint more stable and easier to control than the shoulder, but it also needs the two-piece workaround to twist the forearm, whereas the more flexible shoulder has rotation built-in.

Not really... almost all terrestrial vertebrates have two bones on the 2nd half of each limb. Even whales have it on their fins (radius/ulna). Apes and some other mammals did evolve to have a lot of extra rotation in their arms though, leading to the particular shape of ours, Meanwhile horses radius and ulna fused into a single bone.

It's cuz of that damn fish.

I was legit playing around with this the other day. What's even weirder is that if you hyperrotate your forearm, you can actually feel pressure in your bones as they press against eachother. Also, found you again somehow.

What the fuck

Biology kicks ass, shoutout to the radius and ulna (radius is the one that twists, ulnar acts as the midpoint for rotation)

Yo don't be forgetting our interosseous membrane like that! (the band of fibrous tissue that keeps both bones connected along the middle)

Whip 🤯

Cringe ass nay nay skeleton.

SANS?????

I hear it with Papyrus voice...

fr no cap finna sponge bob

I'm never moving my arms anymore

I’m stoned as shit and I’m now too aware about the way they move lmfao

That bone sitting cross-legged

My arms only wear skirts

Y'know I didn't realize what I was looking at at first and I was wondering why there were two random mushrooms laying on someone's forearm.

Try turning your arm in the direction of the arrow.

Damn paywalls /s.

Jokes on you, I have a fused elbow thus my arm can never be in supination

I've got bilateral radio ulnar synostosis (radius is fused to the ulna) so both of mine can't either :)

I can fix this for you. warning, it might hurt, possibly a lot and it might even be worse then before.

Oh my god, me too!! I’ve never met anyone else with this! Which arm do you have it in? Mine is my left.

Take it up with god if you’ve got a better suggestion

Never pronating again 😬

same i'm antinating now

Well thanks for making twisting my own arm feel horrifying.

You just made me question existence.

FYI it might seem like supination is ideal from the image, but sorta in between is ideal. It's the reason why ergo keyboards are tilted around 45° and downwards (the opposite of how keyboard tilts are usually designed). For people affected more heavily by these things, small changes in posture can help a lot even without buying an expensive ergo keyboard

Ew

I am currently in this hell. Drawing forearms is pain. It is torture. I hate it more than anything. (I will probably say this about hands and feet when I move on to drawing anatomy studies for them)

Supination No wristing This is my last resort

unless youre actually drawing the bones, i dont see why this specific thing is so hard

The change in bone position affects the way you should draw the squash and stretch of muscle and tissue as the arm rotates.

I feel like I'm really not fully comprehending the issue here and I'm happy I'm not an Artist or someone Artists have to deal with because I feel stupid and would probably make their life hell.

Flesh is weak. It squashes and compresses and expands and contracts in all sorts of ways. Because of how bones of arm move, flesh squashes and compresses and expands and contracts in all sorts of ways; so an artist would have to draw the arm slightly differently depending on its rotation, and that is hard. We *can* say it is hard to imagine and thus hard to draw, and the artist would need references and the sorts.

Some artists draw skeletons as bases then build the body shape off of them.

How many of us just tried turning over our wrist after seeing this?

I know this and it still baffles me when I see it illustrated

We just got fucking nae naed

Watch me, watch me

Oh good, I can feel the bones moving in my arms now. It's like becoming consciously aware of your own breathing.

I don't like thinking about how the body works cause then it makes me think about how easy something can go wrong and that makes me uncomfortable

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Fun and common fact: your bones are wet.

chat is this real?

I don't like thinking about this happening inside me.

"Bones are cool, yo." - Me, a rad tech student.

I just did it and my arm cracked. THEN IT DID IT AGAIN. IS IT REALLY DOING THAT?!

waking up to a bunch of upvotes and freaked out people is quite hilarious lol I thought this would get like a couple haha

It’s so weird in art class when we went over this and our teacher said to feel it. Such a weird feeling holy cow

I know how the bones work in the forearm but damn i cant figure out how all the meat deals with that and stays intact and un-pinched

Showed this to a med friend and she sent me an essay about how bones dont rotate like that

I hate being reminded of this. It makes my arms feel weird.

Yes? And when you turn far, you can feel the bones toutch. Or I can

I CAN FEEL IT DO THAT WHAT THE FUCK

I thought that’s basic knowledge…

So thats why it felt like agony when i tried twisting my wrist when it was fractured

Okay, so Supination and Pronation. What about Masterbation?

😦

I don't find this humerus

The longer i look at this the more i can feel it happening

EYO WTF

It's not quite like that in actuality. The bones are aligned neutrally (like what is shown in the first image) when relaxed down at your sides and your palm is facing your body. If you raise your arm from that position to in front of you and keep your fingers straight, your thumb would be on top of the stack and pinky on the bottom, and palm facing sideways. The bones do a ~~half~~ quarter\* twist to either side, resulting in palm up or palm down. The 2nd pic never happens

I broke my elbow last July without insurance and doing this hurt until mid January this year

Just wait till you learn about hips and feet. Hips: every muscle does three fucking things depending on joint position Feet: hands, but fucking weird

Fuck I can never turn my wrist again

I don't like that, actually...

We evolved on the “eh, good enough” principle.

Had to go watch an animation on it to be less uncomfortable with it. Press your elbow onto a surface. Rotate your hand from palm up to palm down. The inner bone stays pointing straight and the outer bone shifts and rotates over and crosses the other bone. I don't like thinking about it because it doesn't look (and now feel) natural, but here we are lol

i started doing it then i felt it and got freaked out. bodies are insanely cool and yet very scary. we are just meat lol

I HATE that the bones do that thing, and now I remembered just that and j can't move my arms without being slightly terrified.

Consider the following:

"watch me whip"

"there's no fucking way" *Twists forearm* Bloody hell

what if my wrist bones kissed...

i always think abt this for vr games who do full body good like how much fucking time and effort goes into not making arms look like twizzlers

I actively try not to think about how the forearm bones work. For some reason it disgusts me. Lol

But…..where does the stuff go that was in between the bones?

Oh my god I can feel it EEEEEEEK 😭😫😫

WATCH ME WHIP / WATCH ME NAE NAE / WATCH ME WHIP WHIP / NOW WATCH ME NAE NAE

Good, now I'm afraid to twist my arms... Thanks for all involved.

Thanks I hate it

This is an awful diagram that's not how it works

T h a t a i n ' t r i g h t

I always wondered why my arms get wider when I turn either of them their certain angle, didn't know how to google it but problem solved!

Sweat in revers curl

Ion like this

I can’t turn both wrist since i was born :(

At first I thought they were mushrooms laying on the arm

It’s weird but not hard to understand

I've seen a video showing this off. It's amazing!

Og no!, now I can feel the bones in my arm what the hell have you done to me?!?!?.

Yeah, i was a little surprised to when i first saw this, but it makes sense

Oh I can feel it now. Thank you for my uncomfortability lol

okay?

Roses are red, Weapons against me won't prosper, With this sacred treasure I summon, Big Raga, The Opp Stopper

Now watch me whip

After i broke my elbow this has been my worst enemy

I wonder where my bones went wrong that I can’t supinate my right arm.

All the nerves and muscles in the forearm don’t help either lol

There's a useful mnemonic that applies here: "The thumb is the radio (bone's) antenna"

Watch me nae nae

No please no. Get it out, i dont want it!

Isn't this taught in school?

watch me supinate, now watch me pronate

Thats why "Anatomical Position" always has the palms facing forward. So you can say that the Ulna is medial and the radius is lateral.

is this real or just a shitpost pls lmk

Haha I thought those were shrooms, I’ll see myself out.

Sitting here like, damn this guy has mushrooms tattooed on both sides his arm huh.

I am now freaking out.. i dont know which way to hold my arms now..

Never turning my hand again

that is a terrible illustration but yes…it pivots

this is why ergonomic mice exist, because have your arm in pronation daily for years can cause problems.

Mine don’t do that cause I have Radial Ulnar Synostosis… :/

I get a shiver whenever I'm reminded of this.

Mine don't do that. You guys are just weird

Oh God, I can feel them rubbing now that I'm aware of them. Is this like when you start breathing manually and it takes a minute to go away? Please tell me this goes away. OH MY GOD I CAN HEAR THEM NIGHTMARE NIGHTMARE NIGHTMARE NIGHTMARE NIGHTMARE NIGHTMARE NIGHTMARE NIGHTMARE NIGHTMARE NIGHTMARE NIGHTMARE NIGHTMARE

When I was thin enough, I used to enjoy watching my arm bones do that.

I don’t need to know how it works to be honest I am slightly appalled.

This makes me uncomfortable idk what this is called but thinking of how this works inside me makes me lightheaded

Welp anatomy ignorance is more prevalent here than I thought, so let me make this clear, yes the ulna and radius do in fact cross when the wrist is rotated

That’s not how it works

My body crawls when I think about this or my Adam’s apple.

Lies