element Y of fore mesopodium
Oval carpal element that is located on the anteromedial side of the radiale and the anterolateral side of the ulnare. Anteriorly, it articulates with carpals 1 through 4 (or 2 through 5 according to some authors). It is also recognized as centrale by some authors. This element originates from one, two, or three condensation centers. Occasionally it may fuse to carpal 2(1), carpal 3(2), the ulnare, or other elements.