Intercarpal joint movement
The wrist is like a bag containing seven marbles, except for the pisiform bone. The motion of the wrist occurs at the joints between the proximal and distal carpal bones -- the midcarpal joint (MC joint) -- and at this intercarpal joint. The intercarpal joint is the joint between the scaphoid<-> lunate and lunate<-> triquetrum bones in the proximal row and the joint between the trapezium<-> trapezoid, trapezoid<-> capitate, capitate<-> hamate bones in the distal row. This joint hardly moves at all, but it performs complex movements during adduction and abduction.