The MCP joint of the thumb is often affected by rheumatoid arthritis, but itâs unusual to replace it with an artificial one. Instead, the joint can be stiffened, allowing the joints next to it to make up for its loss of movement. This operation is usually effective at easing pain and improving pinching movements.
China is a civilization spanning some six thousand years and comprising a large fraction of humanity. There is evidence of man's prehistoric ancestors living in China some two million years ago, and modern man has lived in the area for at least 18,000 years, possibly much longer.
Chinese art has arguably the oldest continuous tradition in the world, and is marked by an unusual degree of continuity within, and consciousness of, that tradition, lacking an equivalent to the Western collapse and gradual recovery of classical styles.arly  stone age art dates back to 10,000 BC, mostly consisting of simple pottery and sculptures. After this early period Chinese art, like Chinese history, is typically classified by the succession of ruling dynasties of Chinese emperors, most of which lasted several hundred years.