The Shoulder

Concise introduction to how the shoulder articulation works:

3 bones: the collar bone *clavicule*
               shoulder blade *scapula* or *omoplate*
               humerus

2 articulations:
                       acromio-claviculaire, up and down movement
(the acromion is the extremity of the shoulder)
                       scapulo-humeral, rotation in space and in front of the body

The head of the humerus faces a cavity in the shoulder blade, at the *cavité glénoide*.

There is a protective coating, with a stabilizing function, *bourrelet*

A set of four rotator muscles hold the two together, front and back
movement of the shoulders.

There are two small bags which circulate a liquid to minimize friction
between moving parts.


http://www.e-sante.fr/anatomie-articulation-epaule-expliquee-en-video/video/683