Fig. (1) Extension and flexion with terminal ROM in a healthy wrist of a 43-year-old male: In extension, the relative portion in midcarpal joint is approximately two-third whereas in flexion radio- and midcarpal motion is approximately equally divided (red lines). During extension, the anatomically determined dorsal-volar slope of radial articular surface allows a slight translocation of lunate to volar (arrow) accompanied by its more tilting in radiolunate joint to dorsal than during flexion to volar (yellow points and lines), and followed by more tilting of capitate in lunate-capitate joint to dorsal compared to volar during flexion (red lines).