Editing Triquetral bone (section)

==Structure==
The triquetral is one of the eight [[carpal bone]]s of the [[hand]]. It is a three-faced bone found within the proximal row of carpal bones. Situated beneath the [[pisiform bone|pisiform]], it is one of the carpal bones that form the carpal arch, within which lies the [[carpal tunnel]]. 
<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}}

The triquetral bone may be distinguished by its pyramidal shape, and by an oval isolated facet for articulation with the pisiform bone. It is situated at the upper and ulnar side of the carpus. To facilitate its palpation in an exam, the hand must be radially deviated so that the triquetrium moves out from under the ulnar styloid process. The triquetrum may be difficult to find, since it also lies under the pisiform.

The triquetral bone has nutrient foramina for entering the nutrient vessels into the bone which comes from branches of the radial, ulnar, and interosseous arteries.<ref>{{cite journal |last1=balci |first1=aybegum |title=The morphologic and morphometric features of the triquetrum |journal=Hand Surgery and Rehabilitation |date=1 November 2022 |volume=42 |issue=1 |pages=40–44 |doi=10.1016/j.hansur.2022.11.002}}</ref>