Lunate

Description

• General
  • The word Lunate is derived from the Latin word Luna meaning crescent-shaped or moon.
  • Situated in the center of the proximal row of the Carpus.
  • Located between the Scaphoid and Triquetrum.
• Anatomic Description
  • The superior surface is convex and smooth that articulates with the Radius.
  • The inferior surface is deeply concave articulating with the head of the Capitate and the Hamate.
  • The lateral surface has a narrow, semilunar facet for articulation with the Scaphoid.
  • The medial surface has a smooth facet, for articulation with the Cuneiform.

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Actions

• Function
  • Provide osseous structure to the wrist
  • Involved in movement of the wrist
• Articular
  • Radius proximally
  • Capitate and Hamate distally
  • Scaphoid laterally
  • Triquetrum medially
• Ligament Attachments
  • Scapholunate Ligament
  • Luno-triquetral Ligament
  • Radio-luno-triquetral Ligament
  • Radio-scapho-lunate Ligament
  • Ulno-lunate ligaments

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Vascular supply

• Branches from the dorsal radiocarpal arch and dorsal intercarpal arch.

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Clinical Significance

• Lunate Fracture
• Lunate Dislocation
• Kienbocks Disease
• Scapholunate Instability
• Lunotriquetral Instability

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See Also

• Hand and Wrist Anatomy (Main)
• Hand And Wrist Anatomy
• Wrist Pain (Main)

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