Left hand anterior view (palmar view). Pisiform bone shown in red.
The left pisiform bone
|Origins||ulnar collateral ligament|
|Anatomical terms of bone|
The pisiform bone (// or //), also called pisiforme bone (Latin) (from the latin pisifomis, pea-shaped), is a small knobbly, pea-shaped sesamoid bone that is found in the wrist. It forms the ulnar border of the carpal tunnel.
The pisiform bone may be known by its small size, and by its presenting a single articular facet. It is situated on a plane anterior to the other carpal bones and is spheroidal in form. It articulates only with the triquetral. It situated where the ulna joins the carpus (wrist).
Its dorsal surface presents a smooth, oval facet, for articulation with the triquetral: this facet approaches the superior, but not the inferior border of the bone.
The lateral and medial surfaces are also rough, the former being concave, the latter usually convex.
The etymology derives from the Latin pīsum which means "pea".
|Wikimedia Commons has media related to Pisiform bone.|
- This article uses anatomical terminology; for an overview, see anatomical terminology.
Pisiform bone (red) forms ulnar border of the carpal tunnel. Left hand. Animation.
- Cross section image: limbs/hand/hand-fr-1 - Plastination Laboratory at the Medical University of Vienna
- Hand kinesiology at the University of Kansas Medical Center
- Illustration at ntu.edu.tw