Trapezium bone

The trapezium bone (greater multangular bone) is a carpal bone, in what is commonly referred to as the wrist.

The trapezium is distinguished by a deep groove on its palmar surface. It is situated at the radial side of the carpus, between the scaphoid and the first metacarpal bone.

The etymology derives from the Greek trapezion which means "irregular quadrilateral;" literally, "a little table," from trapeza meaning table. Also, from tra- "four" and peza "foot" or "edge."

==pooward; it transmits the tendon of the Flexor carpi radialis, and is bounded laterally by an oblique ridge. This surface gives origin to the Opponens pollicis and to the Abductor and Flexor pollicis brevis; it also affords attachment to the transverse carpal ligament.

The lateral surface is broad and rough, for the attachment of ligaments.

The medial surface presents two facets; the upper, large and concave, articulates with the trapezoid; the lower, small and oval, with the base of the second metacarpal.

Additional images
Großes Vieleckbein Trapecio (hueso) Os trapèze Trapezio (osso) Trapézcsont Os trapezium 大菱形骨 Kość czworoboczna większa Trapézio (osso) Lichobežníkovitá väčšia kosť กระดูกทราพีเซียม