Espiral AtlasTrapezium
os trapezium
Study entry
Parts
Four-sided bone of the distal row, with a palmar tubercle and a saddle-shaped surface for the 1st metacarpal.
Joints
Scaphoid, trapezoid, 1st and 2nd metacarpals.
Clinical
The joint with the 1st metacarpal is that of the thumb, the most mobile of the hand.
Source: cap. 3, «Huesos de la mano»