Trapezoid bone

From WikiMD's Wellness Encyclopedia

(Redirected from Lesser multangular bone)

Trapezoid bone

The Trapezoid bone is one of the eight carpal bones of the hand. It is located in the distal row of the carpus, between the trapezium and the capitate bone. The trapezoid bone is the smallest bone in the distal row. It may be distinguished by its wedge-like form.

Structure[edit | edit source]

The trapezoid bone is wedge-shaped, and has four surfaces. It is located between the trapezium and the capitate in the distal row of the carpal bones. The trapezoid is distinguished by a deep groove on its palmar surface. It is the least often fractured of the carpal bones.

Surfaces[edit | edit source]

The trapezoid has four surfaces: superior, inferior, lateral, and medial.

  • The superior surface is quadrilateral and slightly concave. It articulates with the scaphoid bone.
  • The inferior surface articulates with the proximal part of the second metacarpal bone.
  • The lateral surface, convex and smooth, articulates with the trapezium.
  • The medial surface, concave and smooth, articulates with the capitate.

Function[edit | edit source]

The trapezoid bone contributes to the conformation of the carpal tunnel and the carpal arch.

Clinical significance[edit | edit source]

Injuries to the trapezoid are rare. When they do occur, they are often associated with fractures of other carpal bones.

See also[edit | edit source]

References[edit | edit source]


External links[edit | edit source]

  • Trapezoid bone at the US National Library of Medicine Medical Subject Headings (MeSH)
Trapezoid bone Resources
Wikipedia
WikiMD
Navigation: Wellness - Encyclopedia - Health topics - Disease Index‏‎ - Drugs - World Directory - Gray's Anatomy - Keto diet - Recipes

Search WikiMD

Ad.Tired of being Overweight? Try W8MD's physician weight loss program.
Semaglutide (Ozempic / Wegovy and Tirzepatide (Mounjaro / Zepbound) available.
Advertise on WikiMD

WikiMD's Wellness Encyclopedia

Let Food Be Thy Medicine
Medicine Thy Food - Hippocrates

Medical Disclaimer: WikiMD is not a substitute for professional medical advice. The information on WikiMD is provided as an information resource only, may be incorrect, outdated or misleading, and is not to be used or relied on for any diagnostic or treatment purposes. Please consult your health care provider before making any healthcare decisions or for guidance about a specific medical condition. WikiMD expressly disclaims responsibility, and shall have no liability, for any damages, loss, injury, or liability whatsoever suffered as a result of your reliance on the information contained in this site. By visiting this site you agree to the foregoing terms and conditions, which may from time to time be changed or supplemented by WikiMD. If you do not agree to the foregoing terms and conditions, you should not enter or use this site. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates Wikipedia, licensed under CC BY SA or similar.

Contributors: Prab R. Tumpati, MD