Here's a little gallery of images of the bones of the shoulder girdle. I had some trouble gluing the plastic clavicle to the plastic scapula, and I strengthened the joint with a little brass hing mounted 90 degrees to its usual bend axis. In doing so, I lost the little "step-down" from the clavicle to the scapula that artists often point out, but that I seldom see shown in medical diagrams.
UPDATE 3/8/2009
How the scapula actually rotates during arm elevation -- its center(s) of rotation identified.
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