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Encyclopedia > Lunate bone

The lunate bone (os lunatum; semilunar bone) is a bone in the human hand that may be distinguished by its deep concavity and crescentic outline. It is situated in the center of the proximal row of the carpus, or wrist, between the navicular bone and triangular bone. The superior surface, convex and smooth, articulates with the radius. The inferior surface is deeply concave, and of greater extent from before backward than transversely: it articulates with the head of the capitate, and, by a long, narrow facet (separated by a ridge from the general surface), with the hamate. The dorsal and volar surfaces are rough, for the attachment of ligaments, the former being the broader, and of a somewhat rounded form. The lateral surface presents a narrow, flattened, semilunar facet for articulation with the navicular. The medial surface is marked by a smooth, quadrilateral facet, for articulation with the triangular. Grays illustration of a human femur, a typically recognized bone. ... Binomial name Homo sapiens Linnaeus, 1758 Subspecies Homo sapiens idaltu (extinct) Homo sapiens sapiens Human beings define themselves in biological, social, and spiritual terms. ... Alternate meanings: Hand (disambiguation) A human left hand The hand (med. ... In human anatomy, the wrist is the flexible and narrower connection between the forearm and the hand. ... The navicular bone (also called the navicular or scaphoid) is a small boat-shaped human bone of the tarsus. ... The radius and ulna of the left forearm, posterior surface. ...

image:Gray222.png
The left lunate bone

From Grays Anatomy File links The following pages link to this file: Carpus Lunate bone Wikipedia:Grays Anatomy images with missing articles 5 Categories: Public domain images ...

Articulations

The lunate articulates with five bones: the radius proximally, capitate and hamate distally, navicular laterally, and triangular medially.


See also


This article is based on an entry from the 1918 edition of Gray's Anatomy, which is in the public domain. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. Grays illustration of a human femur, a typically recognized bone. ... In zootomy, several terms are used to describe the location of organs and other structures in the body of bilateral animals. ... Henry Grays Anatomy of the Human Body, commonly known as Grays Anatomy, is an anatomy textbook widely regarded as a classic work on human anatomy. ... The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ...


  Results from FactBites:
 
Lunate bone - encyclopedia article about Lunate bone. (778 words)
The lunate bone (os lunatum; semilunar bone) is a bone Bone is a type of hard endoskeletal connective tissue found in many vertebrate animals.
The superior surface, convex and smooth, articulates with the radius radius is the bone of the forearm that extends from the inside of the elbow to the thumb side of the wrist.
The lunate articulates with five bones: the radius proximally, capitate and hamate distally, navicular laterally, and triangular medially.
biology - Carpus (1958 words)
In tetrapods, the carpus is the cluster of bones in the hand between the radius and ulna and the metacarpus.
The medial surface presents two articular facets; of these, the superior or smaller is flattened of semilunar form, and articulates with the lunate bone; the inferior or larger is concave, forming with the lunate a concavity for the head of the capitate bone.
The pisiform articulates with one bone, the triangular.
  More results at FactBites »

 
 

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