Lunate

Original Editor

Top Contributors - Kim Jackson and Nina Myburg

Description

The lunate is one of eight carpal bones that form part of the wrist joint. It is situated in the center of the proximal row of carpal bones. The word lunate is derived from the Latin word luna which means "crescent-shaped" or ("moon),The bone's shape resembles that of a crescent moon.[1]

Lunate bone (Left hand) - Animation

Structure

The lunate It is situated in the center of the proximal row of the carpal bones between the scaphoid and triquetrum.[2] It is crescent-shaped with a few articulation surfaces. The lunate is stabilised by a ligament to the scaphoid and a ligament to the triquetrum. Ligaments between the radius and lunate also stabilise the position of the lunate,

Lunate Bone - Animation

Function

The carpal bones function as a unit to provide bony structure to the hand and wrist. As a proximal carpal bone, the lunate together with the scaphoid, radius and ulna is also involved in movement of the wrist.

Articulations

The lunate articulates with five bones: the radius proximally, capitate and hamate distally, scaphoid laterally, and triquetrum medially.[1]

See also

References

  1. 1.0 1.1 Gray H. Anatomy of the Human Body. Twentieth edition. Philadelphia: Lea & Febiger; 1918 Available from: https://www.bartleby.com/107/54.html [Accessed 19 June 2019]
  2. Moore KL, Dalley AF. Clinically Oriented Anatomy. Fifth edition. Philadelphia: Lippincot Williams & Wilkins; 2006