The ulna forms part of the wrist joint and elbow joints. Swelling and bruising from bleeding in the joints, soft tissue, and muscles may also occur. Some people also experience stiffness or swelling in the joints and weight loss. Stiffness of the affected joints generally worsens over time. It causes a kind of tuberculous arthritis of the intervertebral joints. The upper fibers act as abductors of the hip joints. The somatic part consists of the nerves that innervate the skin, joints, and muscles. Arthritis is a term often used to mean any disorder that affects joints. There are seven types of synovial joints. Arthritis is a disorder of the joints. It involves inflammation of one or more joints. These signs help distinguish rheumatoid from non-inflammatory problems of the joints, such as osteoarthritis. Complications may include megacolon, inflammation of the eye, joints, or liver, and colon cancer. It can increase stress on the inferior and the superior intervertebral joints. These dolls may be strung with elastic or assembled with hinges in their ball joints.