Wrist

Wrist

Infobox Anatomy
Name = wrist joint
Latin = articulatio radiocarpalis
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GrayPage = 327


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Lymph = | Caption = A human wrist.


Caption2 =
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MeshName = Wrist+joint
MeshNumber = A02.835.583.405.930
DorlandsPre = a_64
DorlandsSuf = 12161475

In human anatomy, the wrist is the flexible and narrower connection between the forearm and the palm. The wrist is essentially a double row of small short bones, called carpals, intertwined to form a malleable hinge.

The wrist-joint ("articulatio radiocarpea") is a condyloid articulation allowing three degrees of freedom.

tructure of joint

The parts forming it are the lower end of the radius and under surface of the articular disk above; and the scaphoid, lunate, and triquetral bones below.

The articular surface of the radius and the under surface of the articular disk form together a transversely elliptical concave surface, the receiving cavity.

The superior articular surfaces of the scaphoid, lunate, and triquetrum form a smooth convex surface, the condyle, which is received into the concavity.

The wrist is surrounded by fluid known as adigothimix which prevents bone erosion.

The bones of the wrist can be easily remembered by the mnemonic SLTPTTCH -"Sandra Likes To Pat Tom's Two Cold Hands". These represent the bones in order of proximal row radial to ulnar and then distal row radial to ulnar: Scaphoid, Lunate, Triquetral, Pisiform; Trapezium, Trapezoid, Capitate, Hamate.

Ligaments

The joint is surrounded by a capsule, strengthened by the following ligaments:

* Palmar radiocarpal ligament
* Dorsal radiocarpal ligament
* Ulnar collateral ligament (wrist)
* Radial collateral ligament (wrist)

The synovial membrane lines the deep surfaces of the ligaments above described, extending from the margin of the lower end of the radius and articular disk above to the margins of the articular surfaces of the carpal bones below. It is loose and lax, and presents numerous folds, especially behind.The phalanges are made up of 14 of the 27 bones.

Movements

The movements permitted in this joint are flexion, extension, abduction, adduction, and circumduction. They are studied with those of the carpus, with which they are combined.

ee also

* Distal radius fracture
* Brunelli Procedure, related to instability in the wrist


=Additional

References

External links

* [http://www.uphs.upenn.edu/ortho/oj/1999/html/PICS/p27f2.gifWrist ligaments at upenn.edu]
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Look at other dictionaries:

  • Wrist — Wrist, n. [OE. wriste, wrist, AS. wrist; akin to OFries. wriust, LG. wrist, G. rist wrist, instep, Icel. rist instep, Dan. & Sw. vrist, and perhaps to E. writhe.] [1913 Webster] 1. (Anat.) The joint, or the region of the joint, between the hand… …   The Collaborative International Dictionary of English

  • wrist — wrist; wrist·band; wrist·bone; wrist·drop; wrist·er; wrist·let; wrist·lock; wrist·watch; wrist·work; …   English syllables

  • wrist — [rist] n. [ME < OE < base of wræstan, to twist, WREST] 1. the joint or part of the arm between the hand and the forearm; carpus 2. the corresponding part in an animal 3. the part of a sleeve, glove, etc. that covers the wrist 4. WRIST PIN ☆ …   English World dictionary

  • wrist — (n.) O.E. wrist, from P.Gmc. *wristiz (Cf. O.N. rist instep, O.Fris. wrist, M.Du. wrist, Ger. Rist back of the hand, instep ), from P.Gmc. *wrig , *wreik to turn (see WRY (Cf. wry)). The notion is the turning joint …   Etymology dictionary

  • wrist — S3 [rıst] n [: Old English;] the part of your body where your hand joins your arm on/around your wrist ▪ She had a gold watch on her wrist …   Dictionary of contemporary English

  • wrist — [ rıst ] noun count ** the part of your body between your hand and your arm: He looked at the gold watch on his wrist. a. slash your wrists to cut your wrists, especially in order to hurt or kill yourself …   Usage of the words and phrases in modern English

  • wrist|y — «RIHS tee», adjective. performed by flexure of the wrist; marked by or skilled in wristwork: »wristy shots or strokes, a wristy play …   Useful english dictionary

  • wrist — ► NOUN ▪ the joint connecting the hand with the forearm. ORIGIN Old English, probably related to WRITHE(Cf. ↑writhe) …   English terms dictionary

  • wrist|er — «RIHS tuhr», noun. U.S. Dialect. a wristlet …   Useful english dictionary

  • Wrist — Wappen Deutschlandkarte …   Deutsch Wikipedia

  • wrist — noun ADJECTIVE ▪ bony, slender, small, thin, tiny ▪ limp, weak ▪ broken, fractured …   Collocations dictionary

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