The deltoid muscle has three distinct parts: the anterior (front), lateral (side ... of tendons and muscles that cover the top of the humerus (a bone in your upper arm) and attach to the shoulder.

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 ...

The humerotrochlear angle is the angle formed by the shaft of the humerus and the axis of the condyles on the lateral radiograph. (Fig. 3) This should be approximately 40°. The anterior ...