Capitate bone: Difference between revisions
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the bone is a hard white structure |
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{{Infobox Bone | |
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Name = Capitate bone | |
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Latin = os capitatum; os magnum | |
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GraySubject = 54 | |
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GrayPage = 226 | |
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Image = Carpus.png | |
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Caption = '''BONES OF HAND'''<BR>''Proximal:'' A=[[Scaphoid bone|Scaphoid]], B=[[Lunate bone|Lunate]], C=[[Triquetral bone|Triquetral]], D=[[Pisiform bone|Pisiform]]<BR>''Distal:'' E=[[Trapezium bone|Trapezium]], F=[[Trapezoid bone|Trapezoid]], G=Capitate, H=[[Hamate bone|Hamate]]<BR> | |
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Image2 = Gray227.png | |
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Caption2 = The left capitate bone | |
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Origins = | |
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Insertions = | |
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Articulations = | |
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MeshName = Capitate+Bone | |
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MeshNumber = A02.835.232.087.319.150.150 | |
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DorlandsPre = o_07 | |
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DorlandsSuf = 12598140 | |
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}} |
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The '''capitate bone''' is a [[bone]] in the [[human]] [[hand]]. The capitate bone is the largest of the [[carpal]] bones, and occupies the center of the wrist. It presents, above, a rounded portion or head, which is received into the concavity formed by the [[scaphoid]] and [[lunate bone]]s; a constricted portion or neck; and below this, the body. The bone is also found in many other mammals, and is [[homology (biology)|homologous]] with the "third distal carpal" of reptiles and amphibians. |
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The etymology derives from the Latin ''capitātus'', "having a head," from ''capit-'', meaning "head." |
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==Surfaces== |
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The ''superior surface'' is round, smooth, and articulates with the [[lunate bone]]. |
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The ''inferior surface'' is divided by two ridges into three facets, for articulation with the second, third, and fourth [[metacarpal bone]]s, that for the third being the largest. |
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The ''dorsal surface'' is broad and rough. |
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The ''volar surface'' is narrow, rounded, and rough, for the attachment of ligaments and a part of the [[Adductor pollicis muscle]]. |
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The ''lateral surface'' articulates with the lesser multangular by a small facet at its anterior inferior angle, behind which is a rough depression for the attachment of an interosseous [[ligament]]. Above this is a deep, rough groove, forming part of the neck, and serving for the attachment of ligaments; it is bounded superiorly by a smooth, convex surface, for articulation with the navicular. |
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The ''medial surface'' articulates with the hamate by a smooth, concave, oblong facet, which occupies its posterior and superior parts; it is rough in front, for the attachment of an interosseous ligament. |
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== Articulations == |
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The capitate articulates with seven bones: the [[scaphoid bone|scaphoid]] and [[lunate bone|lunate]] proximally, the [[second metacarpal]], [[third metacarpal]], and [[fourth metacarpal]] distally, the lesser multangular on the radial side, and the hamate on the ulnar side. |
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== See also == |
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*[[Bone#Terminology|Bone terminology]] |
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*[[Terms for anatomical location]] |
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==Additional images== |
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<gallery> |
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Image:Capitatum_ant.jpg|Os capitatum of the left hand, palmar surface |
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Image:Capitatum_post.jpg|Os capitatum of the left hand, dorsal surface |
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Image:Gray219.png|Bones of the left hand. Volar surface. |
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Image:Gray220.png|Bones of the left hand. Dorsal surface. |
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Image:Gray422.png|Transverse section across the wrist and digits. |
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</gallery> |
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{{Gray's}} |
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{{Bones of upper extremity}} |
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[[Category:Skeletal system]] |
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[[Category:Wrist]] |
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[[ar:العظم الكبير]] |
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[[cs:Hlavatá kost]] |
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[[de:Kopfbein]] |
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[[es:Grande del carpo]] |
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[[eu:Karpoko hezur handi]] |
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[[fr:Os capitatum]] |
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[[hr:Glavičasta kost]] |
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[[it:Capitato]] |
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[[hu:Fejescsont]] |
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[[nl:Os capitatum]] |
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[[pl:Kość główkowata]] |
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[[pt:Osso capitato]] |
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[[ru:Головчатая кость]] |
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[[sk:Hlavičkatá kosť]] |
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[[sh:Glavičasta kost]] |
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[[th:กระดูกแคปปิเตต]] |
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Revision as of 18:07, 27 September 2010
the bone is a hard white structure