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

Understanding Arm Anatomy Before diving into specific ... and arm swings to loosen up the shoulder, bicep, and tricep muscles ...

Deltoid Abduction of the shoulder (moving the arm outwards and away from the body) Outward arm action in a jumping jack Rotator cuffs A group of stabilising muscles of the shoulder which helps to ...

Each role is vital to proper arm function and can only occur when the anatomy around the shoulder is uncompromised. The presence of bony and soft tissue injury as well as muscle weakness and ...