Ricki Yasha Tarr
Sometimes when you learn how something works, you think, Thanks knowledge, that really helped, everything makes more sense, and other times you look up how wrists turn, and it's like WTF?!
May 26, 2024 at 3:26pmWeb
Show threadPistolenkindMay 26, 2024
@RickiTarr
113 / 5.000
gosh, I feel so uneducated. Is this really real? I feel my bones, but I'm too fleshy.
Show threadTom Bellin May 27, 2024
@Pistolenkind @RickiTarr it's true in an x-ray. Your bones don't squish and cross each other.
Show threadBashStKidMay 26, 2024

@RickiTarr Oh, just wait until you look at some comparative evolutionary anatomy. It’s surprising we’re here at all.

Tldr; God is a bodger.

Show threadEveryday.Human DerekMay 26, 2024

@BashStKid @RickiTarr
Ohh yeah.

https://www.britannica.com/animal/Tiktaalik-roseae
I’m constantly amazed. Trying to do a course on evbio. It’s not easy as there’s sooo sooo many variables and variation even within species.

The above according to Neil Shubin is our relative about 375 Mya I think.

Tiktaalik roseae | Fossil Vertebrate, Devonian Fish

Tiktaalik roseae, an extinct fishlike aquatic animal that lived about 380–385 million years ago (during the earliest late Devonian Period) and was a very close relative of the direct ancestors of tetrapods (four-legged land vertebrates). The genus name, Tiktaalik, comes from the Inuktitut language

Encyclopedia Britannica
Show threadBashStKidMay 26, 2024
@EVDHmn @RickiTarr
Yes, I have a bit of background in palaeontology, with some zoology and genetics. Very much in a big dark cave with a small light (which is why you need to talk to all the other folks with lights!)
Show threadEveryday.Human DerekMay 26, 2024
@BashStKid @RickiTarr lol…yeah evbio and behavior ecology has what seems are like 10-15 majors to it. Luckily some overlap kinda sorta… then there’s philosophy
Show threadHumToTableMay 26, 2024
@RickiTarr 😱
Show threadParade du Grotesque 💀May 26, 2024

@RickiTarr

Tentacles, tentacles, tentacles! The only thing that truly works!

Show threadFrisco LaLaMay 26, 2024
@RickiTarr neck and head rotation is also a bit counterintuitive. It’s the shortening of the contralateral/opposite side that moves your head (left muscles “push” your head to the right, and vice versa). 🙃
Show threadRicki Yasha TarrMay 26, 2024
@friscolala Whoa
Show threadAlice McFlurry May 26, 2024
@RickiTarr I broke my wrist/radius playing Red Rover if you want to know what kind of wimp you're dealing with.
Show threadDan CiruliMay 26, 2024
@Alice @RickiTarr Red Rover was the most dangerous game any 80s kid ever played. Literal hand-to-hand combat, full contact, on a playground. Probably broke more arms, chipped more teeth and bloodied more noses than everything else combined.
Show thread2xfoMay 26, 2024
@danciruli @Alice @RickiTarr
I just saw an announcement commemorating the beginning of corporate retreat season and the tugs of war that will accompany it. They encouraged people to be smart and say "that's a lot of kinetic potential, like, enough to hurt everyone involved, actually"
Show threadRacerXMay 26, 2024
@danciruli @Alice @RickiTarr my range of motion is limited due to the shoulder injury I sustained in fifth grade throwing a dodgeball 75 mph. children who caught dodgeballs with their faces never fully recovered from the psychological trauma.
Show threadJillMay 27, 2024
@danciruli @Alice @RickiTarr Old enough to recall playing RR in the 70’s. Agree it was? a dangerous game.
Show threadthe gripe ibisMay 26, 2024
@RickiTarr Bones: They Don't Work How You Thought
Show threadvxoMay 26, 2024
@RickiTarr what the heck kind of spare parts did we evolve out of?!
Show threadChris DudleyMay 26, 2024
@vxo @RickiTarr Mandolin player parts?
Show threadBoots ChantillyMay 26, 2024
@RickiTarr 🫣😳
Show threadJames WuMay 26, 2024

@RickiTarr Your hand doesn’t have many muscles, it’s effectively a marionette puppet, being almost entirely puppeteered from near the elbow using strings (tendons).

Because besides a few of the adjustment motions (and) your thumb, most muscles for moving your fingers and forming grasps are all located in your forearm.

Show threadRoger Crew✅❌☑🗸❎✖✓✔May 26, 2024

@analogist @RickiTarr

anybody who plays piano knows this. It's the part of your forearm that gets achy after a long practice session.

Show threadMichael PorterMay 27, 2024
@analogist @RickiTarr One of my favourite “impress the kids” tricks is showing them how you can grab someone’s arm, just above the wrist, and make the fingers curl when you squeeze the tendons. Big laughs every time (or expressions of horror 😄)
Show threadSeirdyMay 26, 2024

@RickiTarr i’m imagining a clacking sound.

I know they don’t smash together, but what if they did?

Show threadThe Mïghty KräckenMay 26, 2024
@Seirdy @RickiTarr
My bones don't clack, but sometimes there is some popping and creaking as I get older.
Show threadJima May 26, 2024

@Seirdy @RickiTarr I showed the image to my wife and her response was along the lines of "oh, that's why it makes a clicking sound since I broke it."

So, your imagination isn't entirely wrong...

Show threadprincess pancake ​May 26, 2024
@RickiTarr my bones hurt seeing this image
Show threadKayla “Iacovino with an i”May 27, 2024
@natty @RickiTarr SAME
Show thread👩‍🦯The Blind FraggleMay 26, 2024
@RickiTarr You know how they say when you take psychology classes you run the risk of thinking you have everything you learn about? Well that wasn't too much of a problem for me. The real problem was my anatomy and physiology class making me never want to move again, because it was all about how everything you do, even the slightest movement, puts a strain on everything else.
Show threadCatherine is not complacentMay 26, 2024
@RickiTarr you’re looking at it two dimensionally. In three dimensions it would make sense.
Show threadThe Mïghty KräckenMay 26, 2024
@RickiTarr You should look up the lumbrical muscles in the hand! They're unique because they don't attach to bone even though they move bones.
Show threadRicki Yasha TarrMay 26, 2024
@Klaxun Oh lord
Show threadcarpenoctemJun 2, 2024
@RickiTarr @Klaxun Gives an idea how people most have gotten confused by anatomy in the ancient days... maybe that's why church banned opening corpses because that made the holy plan design suddenly looks like... "this? are you serious?"
Show threaddraNgNonMay 26, 2024
@RickiTarr oh, this explains why my PT said "palm UP not palm DOWN" for some exercises to help a hurty shoulder
Show threadSundewMay 27, 2024
@draNgNon @RickiTarr This prompted me to try holding my mouse up against the underside of my desk - a very weird experience!
Show threadHilaryMay 26, 2024

@RickiTarr

I have absolutely the opposite take. How do I get this amazing wrist flexibility? Where does it come from, how can it happen?

Oh, it's just a matter of two bones, that can be parallel or can be crossed. Simple but effective design. Totally works.

Show threadLampMay 26, 2024
@RickiTarr @kkarhan what's WTF about this? how would it be any better?
Show threadDoug Baker - Elbows Up! 🇨🇦May 26, 2024
@RickiTarr I always thought that however knees were designed it must have been on god’s day off.
Show threadKhleedrilMay 27, 2024
@SonofaGeorge @RickiTarr I always thought it was when the monkey first saw a giraffe and thought, "I wish I had knees like them."
Show threadLot⁴⁹May 27, 2024
@SonofaGeorge @RickiTarr Teeth are hardly an unqualified design success either. So much maintenance!
Show threadIdahoLarkMay 27, 2024
@12thRITS @SonofaGeorge @RickiTarr "Intelligent design" and all that. Especially those wisdom teeth.
Show threadAviva GaryMay 26, 2024

@RickiTarr Sometimes logic and the beauty of nature clash...

But nature is generally right 😉

Show threadShantiSMay 26, 2024
@RickiTarr this is also the reason that using a vertical mouse is touted (by the manufacturers of purse!) as being better for your arm and wrist as it avoids the twist of those bones.
Show threadJayMay 26, 2024
@RickiTarr Yeah, that’s why the first image is standard anatomical position, because it keeps the radius from crossing the ulna, even though that “twisted” position is more natural for the arm to be in.
Show threadDavid HoangMay 26, 2024
@RickiTarr @uliwitness Honestly never turning my risks ever again.
Show threadSylvhemMay 26, 2024
@RickiTarr …No? I refuse.
Show threadPusher of PixelsMay 27, 2024

@RickiTarr My favorite 'source info' story was my 6th country report on Portugal.

I almost exactly copied the history part from the World Book encyclopedia. I was wildly not mature enough for the task and the teachers were decidedly not great.

When I got my grade I was told my history 'had gaps'. Mom was like, do we call World Book and let them know? lol

Show threadfaraiweMay 27, 2024

@RickiTarr

https://www.youtube.com/watch?v=rOUlF8R67Dg

KOTEGAESHI Japanese Jujutsu

YouTube
Show threadElon Muksis 🇺🇦 🇵🇸 🇪🇺May 27, 2024
@RickiTarr Now I understand why tennis elbow is so common. Too many moving parts.
Show threadMikeMay 27, 2024
@RickiTarr How I walk around for miles on the tiny bones in my feet is a thing I wonder about sometimes
Show threadAri "Two Foxes" JacksonMay 27, 2024
@RickiTarr also:
Show threadTodd KnarrMay 27, 2024
@arisummerland @RickiTarr Every time I hear someone talk about carpal tunnel syndrome I hear my high-school typing teacher's voice: "Wrists UP! <thwack>". Top of forearm horizontal, top of hand horizontal and even with top of forearm, back straight, top of thighs horizontal, feet on chair bar or flat on floor. For a fixed desk, adjust the height of the chair first and the height of the bar second. Adjustable-height desk, feet flat on floor then adjust chair and then desk height.
Show threadMark StosbergMay 27, 2024
@arisummerland @RickiTarr This tragic outcome could have been prevented with an #ErgoMechKeyboard https://lemmy.world/c/ergomechkeyboards
ErgoMechKeyboards - Lemmy.World

Ergonomic, split and other weird keyboards ### Rules #### Keep it ergo [https://gitlab.com/ergomechkeyboards/wiki/-/wikis/Rules#keep-it-ergo] Posts must be of/about keyboards that have a clear delineation between the left and right halves of the keyboard, column stagger, or both. This includes one-handed (one half doesn’t exist, what clearer delineation is that!?) i.e. no regular non-split¹ row-stagger and no non-split¹ ortholinear² ¹ split meaning a separation of the halves, whether fixed in place or entirely separate, both are fine. ² ortholinear meaning keys layed out in a grid #### No Spam [https://gitlab.com/ergomechkeyboards/wiki/-/wikis/Rules#no-spam] No excessive posting/“shilling” for commercial purposes. Vendors are permitted to promote their products/services but keep it to a minimum and use the [vendor] flair. Posts that appear to be marketing without being transparent about it will be removed. #### No Buy/Sell/Trade [https://gitlab.com/ergomechkeyboards/wiki/-/wikis/Rules#no-buyselltrade] This subreddit is not a marketplace, please post on r/mechmarket or other relevant marketplace. ### Some useful links - EMK wiki [https://gitlab.com/ergomechkeyboards/wiki/-/wikis/home] - Split keyboard compare tool [https://jhelvy.shinyapps.io/splitkbcompare/] - Compare keycap profiles Looking for another set of keycaps - check this site to compare the different keycap profiles https://www.keycaps.info/ [https://www.keycaps.info/] - Keymap database A database with all kinds of keymap layouts - some of them fits ergo keyboards - get inspired https://keymapdb.com/ [https://keymapdb.com/]

Show threadbjb  May 27, 2024
@arisummerland @RickiTarr
Thanks for reminder, time to move mouse to other side
Show thread66gardenersMay 27, 2024
@arisummerland @RickiTarr
In my case, I ran into the garden
Show threadLooking for explanations…May 27, 2024
@arisummerland
Thank you for this sage advice.
Show threadÖlbaumMay 27, 2024

@RickiTarr And then you have the technique to rotate your hand without turning your wrist. 🤯

(Hold your arm straight in front of you, palm down, bend it horizontally by 90°, rotate it so it’s vertical, extent it to the front. Repeat. Your palm is now facing up.)

Show threadTatiana LaurentMay 27, 2024
@RickiTarr Often skip my mind
Show threadAngua May 27, 2024
@RickiTarr

Hmmm - not if you fracture / dislocate the radius in the UK.
Mine was never fixed so is shorter, almost zero rotation now.
Show threadVioletMay 27, 2024
@RickiTarr
On the one hand, that explains by grabbing the outer edge of someone's hand and gently twisting inward is a powerful control move when defending yourself. On the other hand, it doesn't explain why twisting someone's hand outward then their palm is up has a similar effect.