Description[edit | edit source]
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.
Structure[edit | edit source]
The lunate It is situated in the center of the proximal row of the carpal bones between the scaphoid and triquetrum. 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,
Function[edit | edit source]
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[edit | edit source]
Clinical Relevance[edit | edit source]
An infrequent condition which results due to loss of blood supply resulting in avascular necrosis of lunate known as Kienbock's disease is identified in some individuals.
Signs and symptoms[edit | edit source]
- Wrist pain
- Tenderness directly over the lunate bone
- Decreased motion or stiffness of the wrist