Pisiform bone
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| Bone: Pisiform bone | |
|---|---|
 | |
| BONES OF HAND Proximal: A=Scaphoid, B=Lunate, C=Triquetral, D=Pisiform Distal: E=Trapezium, F=Trapezoidium, G=Capitate, H=Hamate | |
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| The left pisiform bone. | |
| Latin | os pisiforme |
| Gray's | subject #54 225 |
| Origins | ulnar collateral ligament |
| Articulations | triangular |
| MeSH | Pisiform+Bone |
| Dorlands / Elsevier | o_07/12598620 |
The pisiform bone (also called pisiform or lentiform bone) is a small knobbly, pea-shaped wrist bone.
The pisiform bone is found in the proximal row of the carpus. It is located where the ulna (inner bone of the forearm) joins the carpus (wrist). It articulates only with the triquetral.
It is a sesamoid bone.
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."
Contents |
Surfaces
Its dorsal surface presents a smooth, oval facet, for articulation with the triangular: this facet approaches the superior, but not the inferior border of the bone.
The volar surface is rounded and rough, and gives attachment to the transverse carpal ligament, and to the Flexor carpi ulnaris and Abductor digiti quinti.
The lateral and medial surfaces are also rough, the former being concave, the latter usually convex.
See also
Additional images
 Bones of the left hand. Volar surface. |
 Bones of the left hand. Dorsal surface. |
 The muscles of the left hand. Palmar surface. |
External links
- 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
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Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
