|Left hand anterior view (palmar view). Pisiform bone shown in red.|
|The left pisiform bone|
|Gray's||subject #54 225|
|Origins||ulnar collateral ligament|
The pisiform bone is found in the proximal row of the carpus. It is located where the ulna (inner bone of the forearm when in anatomical position) joins the carpus (wrist). It articulates only with the triquetral.
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.
The etymology derives from the Latin pīsum which means "pea".
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.
Pisiform bone (red) forms ulnar border of the carpal tunnel. Left hand. Animation.
- Tim D. White, Human Osteology, 2nd edition (San Diego: Academic Press, 2000), 199, 205.
|Wikimedia Commons has media related to Pisiform bone.|
- Cross section at UV limbs/hand/hand-fr-1
- Anatomy at Dartmouth wrist-hand/bones/bones4
- Hand kinesiology at UK bone/pisiform.html
- Illustration at ntu.edu.tw