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.
The longer of two forearm bones, located on the pinky side of the arm. Radius The shorter of two forearm bones, located on the thumb side of the arm. Ulnar Styloid An extension at the bottom of the ulna where the wristâs pinky-side collateral ligament attaches. Radial Styloid An extension at the bottom of the radius where the wristâs thumb-side collateral ligament attaches. Scaphoid