Carpal

From Wikipedia, the free encyclopedia Carpus Carpus Row Name Proximal/radial articulations radius, lunate radius, scaphoid, triquetral lunate, pisiform (but NOT ulna) triquetral scaphoid scaphoid scaphoid, lunate triquetral, lunate Distal articulations trapezium, trapezoid, capitate capitate, hamate hamate trapezoid trapezium, capitate trapezoid, hamate capitate Metacarpal articulations #1 and #2 #2 #2, #3 and #4 #4 and #5 Proximal Scaphoid Proximal Lunate Proximal Triquetral Proximal Pisiform (sesamoid bone) Distal Distal Distal Distal Trapezium Trapezoid Capitate Hamate Bone: Carpals the wrist to move and rotate vertically, horizontally and laterally. In crustaceans, "carpus" is the scientific term for the claws or "pincers" present on some legs. Variations In some macropods, the scaphoid and lunar bones are fused into the scaphollunar bone.[1] The carpus Characteristics BONES OF HAND Proximal: A=Scaphoid, B=Lunate, C=Triquetral, D=Pisiform Distal: E=Trapezium, F=Trapezoid, G=Capitate, H=Hamate Latin Gray’s MeSH Dorlands / Elsevier ossa carpi subject #54 221 Carpal+Bones Carpus In tetrapods, the carpals is the sole cluster of the bones in the wrist between the radius and ulna and the metacarpus. The bones of the carpus do not belong to individual fingers (or toes in quadrupeds), whereas those of the metacarpus do. The corresponding part of the foot is the tarsus. Carpal bones are not considered part of the hand but are part of the wrist. The carpal bones allow Almost all carpals (except the pisiform) have six surfaces. Of these the palmar or anterior and the dorsal or posterior surfaces are rough, for ligamentous attachment; the dorsal surfaces being the broader, except in the lunate. The superior or proximal, and inferior or distal surfaces are articular, the superior generally convex, the inferior concave; the medial and lateral surfaces are also articular where they are in contact with contiguous bones, otherwise they are rough and tuberculated. The structure in all is similar: cancellous tissue enclosed in a layer of compact bone. See also • Bone terminology • Terms for anatomical location • Carpal tunnel 1 From Wikipedia, the free encyclopedia • Carpal tunnel syndrome Palmar surface. Dorsal surface. Carpus articulations at the wrist, showing the synovial cavities. Additional images References Human hand bones Bones of the left hand. [1] Bones of the left hand. Swamp Wallaby (Wallabia bicolor) carpals External links Vertical section through the • SUNY Labs 08:os-0101 - "Palm of the Hand: Carpal bones" • Hand kinesiology at UK bone/wrist.html Retrieved from "http://en.wikipedia.org/wiki/Carpus" Categories: Bones of the upper limb, Short bones, Wrist This page was last modified on 30 March 2009, at 20:34 (UTC). All text is available under the terms of the GNU Free Documentation License. (See Copyrights for details.) Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a U.S. registered 501(c)(3) tax-deductible nonprofit charity. Privacy policy About Wikipedia Disclaimers 2