MistyLaraCarrara opened this issue on Oct 03, 2012 · 39 posts
bagginsbill posted Wed, 03 October 2012 at 10:49 AM
Sam is right.
The deltoid muscle abducts the arm, but at 90 degrees the humerus bumps into the acromion. Beyond this point, further abduction is the result of upward scapular rotation.
Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)