Muscles move the humerus. The humerus is your upper arm bone. It is the only bone in the upper arm, and it is also the largest bone in the upper extremity. The top of the humerus joins with an ...

You’re not alone. In this video, we break down some of the most common anatomy mistakes artists make when drawing arms — from misunderstood muscle groups to awkward proportions and stiff poses.

Outward arm action in a jumping jack Rotator cuffs A group of stabilising muscles of the shoulder which helps to prevent dislocation and allows the shoulder to rotate the humerus around its own ...