What is an annular ligament?

Ring ligament is a ligament connecting the bone of the radius with a unna bone on the proximal Radioulnar joint in the human forearm. The circular shape of this lig is wrapped around the radius head, which runs parallel to the ulna and connects to the ulny bones. This shape is what allows the radius to rotate back and forth along the ulna, and therefore allows the forearm or palm and palm rotation. Anular ligament also holds the radius in place against the ulna. Part of the bone of the radius is articulated with a radial notch between the edges, where the ligament begins and ends in creating a proximal Radioulnar joint, the type of synovial joint known as the swivel joint. The swivel joints consist of a cylindrical bone - in this case the head of the radius - with another bone and the connected ring of the ligament that rotates around it. This particular joint is characterized by the presence of an annular ligament.

like a ring on a finger, a ring ligament surrounds the head of the radius and attachesto uln. Movement allowed by this articulation is the supination or rotation of the forearm deck. To allow this movement, responsible muscles, biceps brachii at the top of the arm and supinator in the forearm, attach to the radius and pull it during contraction. This causes the radius rotation in the ulna ring ligament. Similar rotation occurs in the opposite direction during the movement of pronation or rotation of the forearm deck, but most of the action occurs on the distal Radioulnar joint, where the radius and ulna meet just above the wrist.

Ring liga is also what the radius keeps in place against the ulna. Therefore Also known as the elbow of Nursemaid, most often seen in young children and is usually due to a strong ecstasy of the arm, as in an adult pulling or lifting a child behind the wrist. As a result, the radius is pulled out of a place, an injury that is usually treated with a non -surgically doctor who can dospace in the ligament radius.