Posterior shoulder dislocation occurs when the top of the upper arm bone, known as the humerus, moves backward out of its socket. This causes pain, muscle spasms, and a limited range of motion.

The shoulder has a wide range of motion making it the most mobile joint. But because of this flexibility, it's not very stable and easily injured.

Medically reviewed by Jennifer Steinhoff, MD Shoulder blade pain is discomfort in or around your shoulder blades. It usually develops from muscle strain due to injury or overuse. However, it can ...

From your shoulders to your fingers, your arms have many moving parts: joints, bones, muscles, nerves, tendons and ligaments. Mysterious arm pain that seemingly comes out of nowhere can arise if ...

It serves as part of the shoulder joint and as an anchor for many of the arm, upper back, and shoulder muscles. Scapula function depends on these muscles, which include the: Levator scapulae .

The complex structures of the arm and shoulder areas, consisting of bone, muscles, ligaments and tendons allow us to move freely. However, this mobility makes these components vulnerable to injury ...

Q: My shoulder's been aching for several months, mainly whenever I try to reach out to the side, behind my back or overhead. My doctor says MRI and X-rays are normal and gave me a cortisone ...

Doctors use cadaver bone and cartilage to sculpt new shoulders. Updated: ; Jan. 07, 2010, 4:26 p.m. | Published: ; Jan. 07, 2010, 3:26 p.m.

The humerus is a single bone in your upper arm that runs from your shoulder to your elbow. The radius and ulna, bones of your forearm, run from the elbow to the wrist.

Shoulder arthritis is damage to the cartilage in the ball-and-socket joint of your shoulder. The smooth covering of cartilage between your shoulder bones allows your shoulder to move and rotate ...