Phalanges of the hand
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2008-05-07T06:29:42Z
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{{Infobox Bone |
Name = Phalanges of the hand |
Latin = osssa digitorum manus, phalanges digitorum manus |
GraySubject = 56 |
GrayPage = 230 |
Image = Gray234.png |
Caption = Plan of ossification of the hand. |
Image2 = Gray220.png |
Caption2 = Bones of the left hand. Dorsal surface. |
System = |
Precursor = |
MeshName = |
MeshNumber = |
DorlandsPre = o_07 |
DorlandsSuf = 12598287 |
}}
The '''phalanges of the [[hand]]''' are commonly known as the finger bones. There are fourteen in number, three for each [[finger]], and two for the [[thumb]].
Each consists of a body and two extremities.
* The ''body'' tapers from above downward, is convex posteriorly, concave in front from above downward, flat from side to side; its sides are marked by rough areas which give attachment to the fibrous sheaths of the flexor tendons.
* The ''proximal extremities'' of the bones of the first row present oval, concave articular surfaces, broader from side to side than from front to back. The [[proximal]] extremity of each of the bones of the second and third rows presents a double concavity separated by a median ridge.
* The ''[[distal]] extremities'' are smaller than the proximal, and each ends in two [[condyles]] separated by a shallow groove; the articular surface extends farther on the [[volar]] than on the [[dorsal]] surface, a condition best marked in the bones of the first row.
The ungual phalanges, those most distal, are convex on their dorsal and flat on their volar surfaces; they are recognized by their small size, and by a roughened, elevated surface of a horseshoe form on the volar surface of the distal extremity of each which serves to support the sensitive pulp of the finger.
==See also==
* [[Interphalangeal articulations of hand]]
* [[Phalanx bones]]
==Additional images==
<gallery>
Image:Gray337.png|Metacarpophalangeal articulation and articulations of digit. Volar aspect.
Image:Gray338.png|Metacarpophalangeal articulation and articulations of digit. Ulnar aspect.
</gallery>
==External links==
* {{NormanAnatomy|lesson5palmofhand}}
{{Gray's}}
{{Bones of upper extremity}}
[[Category:Hand]]
[[Category:Skeletal system]]
{{musculoskeletal-stub}}
[[es:Falanges de la mano]]
[[ga:Cnámha chaol na láimhe]]
[[hu:A kéz ujjperccsontjai]]
[[sl:Prstnice rok]]
[[th:กระดูกนิ้วมือ]]