The distal dorsal intermetacarpal ligament: characterization of an overlooked structure-an anatomical study of 25 hands.

All dissections revealed a tense ligamentous structure between each metacarpal head of the long fingers. This was a constant structure meeting the definition of a ligament. The distal dorsal intermetacarpal ligament seems to stabilize the metacarpal heads at the second and fourth spaces by limiting hyperabduction.