Arddwrn

Yn anatomeg dynol, diffinnir yr arddwrn fel 1) y carpws neu'r esgyrn carpalaidd, h.y. y
cymhlyg o wyth asgwrn sy'n ffurfio'r segment ysgerbydol agosaf yn y llaw;Behnke 2006, td 76. "The wrist contains eight bones, roughly aligned in two rows, known as the carpal bones."Moore 2006, td 485. "The wrist (carpus), the proximal segment of the hand, is a complex of eight carpal bones.  The carpus articulates proximally with the forearm at the wrist joint and distally with the five metacarpals.  The joints formed by the carpus include the wrist (radiocarpal joint), intercarpal, carpometacarpal and intermetacarpal joints.  Augmenting movement at the wrist joint, the rows of carpals glide on each other [...] " 
(2) cymal yr arddwrn neu'r cymal radio-carpol, y cymal rhwng y radiws a'r carpws; a'r 
(3) ardal anatomegol sy'n amgylchynnu'r carpws gan gynnwys y pen pellaf o esgyrn yr elin a'r pen agosaf o'r metacarpws neu'r pump asgwrn metacarpaidd a'r cyfres o gymalau rhwng yr esgyrn hyn, a gyfeirir atynt fel cymalau'r arddwrn.Behnke 2006, td 77. "With the large number of bones composing the wrist (ulna, radius, eight carpas, and five metacarpals), it makes sense that there are many, many joints that make up the structure known as the wrist."Baratz 1999, td 391. "The wrist joint is composed of not only the radiocarpal and distal radioulnar joints but also the intercarpal articulations." Mae'r ardal hon hefyd yn cynnwys twnnel y carpws, y pannwl radiol (foveola radialis), tynnyn traws y carpws (retincalum flexorum) a thynnyn cefnol y carpws (retinaculum extensorum).

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Categori:Anatomeg ddynol