Local arthritis is a condition that is very rapid in onset. Physicians give it a long name–localized spontaneous osteonecrosis–and like any arthritis of the joint, the condition is characterized by inflammation (osteo means "bone" and necrosis means "dying").
Almost everyone has synovial folds, or plicae, in their knees. The most common location is along the inner knee. Occasionally, a fold may be present above the kneecap. Ordinarily, the synovium lines the joint cavities of the knee, but sometimes an overgrowth of normal tissue occurs.
The menisci, crescent-shaped fibrous cartilage between the shinbone and thighbone, are the shock absorbers of the knee. There are two in each knee, riding along each side of the knee like shock absorbers on a car. Like ligaments, they can be injured with severe twisting or jarring, weight-bearing movement.
Tendonitis of the wrist affects millions of Americans everyday. This condition is more prevalent now as more and more people lead lives behind the screen of a computer or smartphone. This type of lifestyle leads to your wrist having to do repetitive motions throughout the day.
The four main ligaments of the knee are the anterior and posterior cruciate ligaments and the medial and lateral collateral ligaments. The anterior cruciate (cruciate means “cross”) is the front cross ligament of the knee. It prevents the tibia, or lower leg bone, from coming forward. Injury to this ligament is so common that Sports Illustrated once devoted an entire article to this ligament.