carpal tunnel syndrome. 1  a medical condition that is characterized by pain, numbness, etc. in the wrist, palm, fingers, and thumb, usually caused by repetitive hand movement, as in typing or knitting, which swells the tissue surrounding the nerve in a tunnel-like passage (carpal tunnel) in the wrist.
1 The radius is located laterally, nearer the thumb, and the ulna medially, nearer the little finger.The radius and the ulna have a styloid process at the distal end and are attachment sites for many muscles.  The radius is smaller than the ulna.
1 The proximal shaft of ulna is fractured, and the head of the radius dislocates anteriorly at the elbow.  Galeazziâs Fracture â A fracture to the distal radius, with the ulna head dislocating at the distal radio-ulnar joint.