Cable brace system

A brace for a wrist, comprising;

• a semi-rigid radius plate configured to receive a first radius portion of an arm and including a tightening strap, the semi-rigid radius plate having a cable guide;
• a semi-rigid metacarpal shell configured to receive a metacarpal portion of a hand, the semi-rigid metacarpal shell being rotatable relative to the radius plate thereby allowing up and down movement of the wrist and having a cable guide;
• a tendon back plate configured to be positioned on an underside of the wrist, and wherein the back plate cooperates with the semi-rigid radius plate and the semi-rigid metacarpal shell, the tendon back plate having a cable guide;
• a first substantially inelastic cable, wherein the first cable is routed from the semi-rigid radius plate, the first cable traveling around the tendon back plate, the first cable traveling around and over the top of the semi-rigid metacarpal shell, the first cable crossing over itself at a crossover point at the tendon back plate, and then the first cable traveling back to the top of the semi-rigid radius plate, and wherein the first cable is routed through a tensioning mechanism,
• and wherein a radius loop portion of the first cable, which extends from the crossover point over the semi-rigid radius plate and back to the crossover point, and a metacarpal loop portion of the first cable, which extends from the crossover point over the semi-rigid metacarpal shell and back to the crossover point, are configured such that a lengthening of the metacarpal loop portion of the first cable results in a corresponding shortening of the radius loop portion of the first cable, and further wherein a corresponding tightening force resulting from the shortening of the radius loop portion of the first cable draws the semi-rigid radius plate and the tendon back plate closer together, and provides a radial force along the metacarpal loop portion of the first cable directed toward the center of the metacarpal loop.