Editing Trapezoid bone (section)

==Structure==
The trapezoid is a four-sided [[carpal bone]] found within the [[hand]]. The trapezoid is found within the distal row of carpal bones.<ref name=GRAYS2005>{{cite book|last=Drake|first=Richard L.|title=Gray's anatomy for students|year=2005|publisher=Elsevier/Churchill Livingstone|location=Philadelphia|isbn=978-0-8089-2306-0|author2=Vogl, Wayne |author3=Tibbitts, Adam W.M. Mitchell  |author4=illustrations by Richard |author5= Richardson, Paul }}</ref> {{rp|708}}

===Surfaces===
The ''[[Anatomical terms of location|superior surface]]'', quadrilateral, smooth, and slightly concave, articulates with the [[scaphoid]].

The ''[[Anatomical terms of location|inferior surface]]'' articulates with the [[Anatomical terms of location|proximal]] end of the [[second metacarpal bone]]; it is convex from side to side, concave from before backward and subdivided by an elevated ridge into two unequal facets.

The ''[[Anatomical terms of location|dorsal]]'' and ''[[Anatomical terms of location|palmar]] surfaces'' are rough for the attachment of ligaments, the former being the larger of the two.

The ''[[Anatomical terms of location|lateral surface]]'', convex and smooth, articulates with the [[Trapezium (bone)|trapezium]].

The ''[[Anatomical terms of location|medial surface]]'' is concave and smooth in front, for articulation with the [[capitate]]; rough behind, for the attachment of an interosseous [[ligament]].