Some are anchored to bones within the hand, while others snake their way to the arm. The wrist is a floating cluster of bones and ligaments threaded with blood vessels and nerves. The nerves send ...

It connects the further end of the humerus and the nearest ends of two lower-arm bones: the ulna and radius. The elbow flexes and extends the forearm, and rotates the forearm and wrist.

Repeated hand and wrist movements. They can cause the membranes around the tendons to swell (tenosynovitis). Broken wrist bones, dislocated bones, new bone growth from healing bones, or bone spurs.