The carpal bones (i.e. carpus) are eight irregularly-shaped bones located in the wrist region. These bones connect the distal aspects of the long bones of the forearm (radius and ulna) to the proximal aspects of the metacarpal bones. The carpal bones are organized in two rows: proximal and distal. The proximal row of carpal bones (from radial to ulnar) includes the scaphoid, lunate, triquetrum and pisiform bones. The distal row includes the trapezium, trapezoid, capitate, hamate bones. Each carp