Medically reviewed by Jennifer Steinhoff, MD The humerus is your upper arm bone. It is the longest bone in the upper part of ...

What is the treatment? Dear Reader: Your rotator cuff is the group of muscles and tendons that help anchor the bone of the upper arm, known as the humerus, within the shoulder joint. This is a ...

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 ...