Compression of the ulnar nerve triggers ulnar nerve entrapment. The two most common sites at which this occurs are the wrist and the elbow, but it can also happen between the elbow and the shoulder or the elbow and the wrist. The ulnar nerve’s job is to transmit sensations and motor functions to the hand and the lower arm. If compressed as it passes through the wrist or elbow, the sensation transforms to tingling, weakness, or pain.
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