View source for Interphalangeal articulations of hand

{{Infobox Anatomy |
  Name         = Interphalangeal joints |
  Latin        = articulationes interphalangeae manus, articulationes digitorum manus |
  GraySubject  = 91 |
  GrayPage     = 333 |
  Image        = Human hand bones simple.svg |
  Caption      = Human hand bones |
  Image2       = Gray337.png |
  Caption2     = Metacarpophalangeal articulation and articulations of digit. Volar aspect. |
  Width        = 190 |
  System       = |
  MeshName     = |
  MeshNumber   = |
  DorlandsPre  = a_64 |
  DorlandsSuf  = 12161327  |
}} 
__NOTOC__

{{CMG}}

'''Associate Editor-In-Chief:''' {{CZ}}



==Overview==

The '''interphalangeal articulations of hand''' are [[hinge-joints]] of the [[phalanges of the hand]]. There are two sets (except in the [[thumb]]):

* "proximal interphalangeal joints" (PIP), those between the first (also called proximal) and second (intermediate) [[phalanges]]
* "distal interphalangeal joints" (DIP), those between the second and third (distal) phalanges

A [[Interphalangeal articulations of foot|similar group of articulations]] also function in the [[toes]].

==Ligaments==
Each joint has a [[volar]] ligament and two collateral ligaments. 

The arrangement of these ligaments is similar to those in the [[metacarpophalangeal joint]]s (also known as MCP joints). 

The extensor tendons supply the place of [[posterior ligament]]s.
 
==Movements==
The only movements permitted in the interphalangeal joints are [[flexion]] and [[Extension (kinesiology)|extension]]. 
* Flexion is more extensive, about 100°, in the PIP joints and slightly more restricted, about 80°, in the DIP joints. 
* Extension is limited by the volar and collateral ligaments.

The muscles generating these movements are:

{| class="wikitable"
| '''Location''' || '''Flexion''' || '''Extension'''
 |- 
 | fingers || the [[flexor digitorum profundus]] acting on the [[proximal]] and [[distal]] joints, and the [[flexor digitorum sublimis]] acting on the proximal joints || mainly by the [[Lumbricals of the hand|lumbricales]] and [[interossei]], the long extensors having little or no action upon these joints
 |- 
 | thumb  || the [[flexor pollicis longus]] || the [[extensor pollicis longus]]
|}

==See also==
* [[Finger]]

==External links==
* {{KansasHandKinesiology|bone/phaljt.html}}
* {{eMedicineDictionary|proximal+interphalangeal+joints}}
* {{eMedicineDictionary|distal+interphalangeal+joints}}
* [http://cms.depuy.com/display?docId=40509 Diagram at depuy.com]

{{Gray's}}

{{Joints of upper limbs}}

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[[Category:Anatomy]]
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[[sv:Interfalangealled]]