In another type of systemic scleroderma, known as diffuse cutaneous systemic scleroderma, the fibrosis affects large areas of skin, including the torso and the upper arms and legs, and often involves internal organs.n the third type of systemic scleroderma, called systemic sclerosis sine scleroderma (sine means without in Latin), fibrosis affects one or more internal organs but not the skin.
The UCL, or ulnar collateral. ligament, is located in. the middle thumb joint, and provides support to. the thumb during grip. and pinch. It is the most. common ligament injury.
At the lower articulation of the radius and ulna, the distal radioulnar joint, the adjoining surfaces are the opposite of those on the proximal joint: the cylindrical head of the ulna meets with the ulnar notch on the bottom of the radius.d. The movement allowed at the proximal radioulnar joint is supination, or rotation of the forearm palm-up. To make this movement possible, the muscles responsible, the biceps brachii in the upper arm and the supinator in the forearm, attach to the radius and pull on it during contraction.