Trapezium bone
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| Bone: Trapezium (bone) | |
|---|---|
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| BONES OF HAND Proximal: A=Scaphoid, B=Lunate, C=Triquetral, D=Pisiform Distal: E=Trapezium, F=Trapezoid, G=Capitate, H=Hamate | |
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| Trapezium | |
| Latin | os trapezium, os multangulum majus |
| Gray's | subject #54 225 |
| Articulations | 1st metacarpal distally scaphoid proximally trapezoid medially 2nd metacarpal medially |
| MeSH | Trapezium+Bone |
| Dorlands / Elsevier | o_07/12598800 |
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.
See also
Additional images
 Bones of the left hand. Dorsal surface. |
 Ligaments of wrist. Anterior view |
 Tendons of forefinger and vincula tendina. |
 Transverse section across the wrist and digits. |
hu:Trapézcsont nl:Os trapeziumsk:Lichobežníkovitá väčšia kosť th:กระดูกทราพีเซียม
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