#pronation

[a-dinosaur-a-day]

so which way do dinosaur wrists/hands face? downwards or inwards? i know theres been a lot of debate so im wondering which is truth since your dinosaur funfacts post.

clappers, not slappers. inwards, not downwards.

[hajdara]

Jedna interna

Ja sam radius ti si ulna hajmo u pronaciju ❤️💋

A

[princesswithabraidedcrown]

I see all the pretty ice skating drawings and performance videos and wish that I wasn’t so pronated that I skate on the inside edge of a skate...right up until I remember that ice is hard and it hurts to fall on.

[studydev]

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[a-dinosaur-a-day]

Skeleton question! To what extent could quadrupedal dinosaurs pronate their forelimbs? None? A little? More than you’d think? Do we know?

I got to wondering after seeing a bunch of parasaurolophus art with their forelimbs fully pronated and thought, “that can’t be right, can it?” I tried looking up skeleton photos and got none the wiser, what’s the deal?

they couldn't! All of those drawings are very wrong! their palms should be facing each other!

[a-dinosaur-a-day]

How do theropod hands and shoulders work ?

(skeletal from http://www.skeletaldrawing.com/theropods/allosaurus-fragilis)

So basically the shoulders (usually) have quite a bit of free motion range whereas the wrists not as much. They can fold inwards and a tiny bit outwards and cand sort of fan up and down, but cannot rotate in a way where there hands are perpendicular to their arms. (In other words the “T. rex hands” are wrong because no dinosaur could do that hand rotation. This is called pronation).

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