The elbow joint is where the humerus (upper arm), the ulna (inner forearm), and the radius (outer forearm) come together. The radius and the ulna work together to rotate your forearm, such as when you’re turning a doorknob. The biceps muscle is a major muscle that enables the elbow to act like a hinge between the upper arm and forearm. Elbow injuries are common among athletes.
Nearly all hand and wrist movements rely on stability from the elbow. This makes problems felt in the elbow common across many age groups and activity levels.
Elbow Fracture, Tennis Elbow (Lateral Epicondylitis), Strains, Tendonitis