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

Ball and socket joints also allow flexion and extension. Flexion of the shoulder joint occurs when the humerus (upper arm) moves forwards from the rest of the body, which happens at the end of an ...

The Mariners will be without leadoff hitter and right fielder Victor Robles for at least 12 weeks. Here's more on the injury ...

Rheumatoid arthritis (RA) is known for causing all-over inflammation and pain. It happens when the immune system malfunctions ...

connecting the upper arm (humerus) to the shoulder blade (scapula). The rotator cuff provides stability for the shoulder joint and is responsible for rotating the arm both internally and externally.

Ball and socket joint. Articulating bones are humerus and scapula (the clavicle is not part of the shoulder joint). Allows a great range of movement in all directions. Many muscles are used to ...

Orthopedic injuries may sound like something that only athletes experience, but they often occur in the most basic ways.

Robles' dislocated shoulder caused a small fracture in his humeral head, per a news release sent out by Seattle. Per the release, surgery appears unlikely. The injury will continue to be monitored ...

The Seattle Mariners will be without one of their most dynamic players for the next several weeks. Starting Mariners right fielder and lead-off hitter ...