Pisiform bone

From Wikipedia, the free encyclopedia
  (Redirected from Pisiform)
Jump to: navigation, search
Pisiform bone
Pisiform bone (left hand) 01 palmar view.png
Left hand anterior view (palmar view). Pisiform bone shown in red.
Gray224.png
The left pisiform bone
Details
Latin Os pisiforme
Origins ulnar collateral ligament
Articulations triangular
Identifiers
Gray's p.225
MeSH A02.835.232.087.319.150.600
Dorlands
/Elsevier
o_07/12598620
TA A02.4.08.007
FMA FMA:23718
Anatomical terms of bone

The pisiform bone (/ˈpsɨfɔrm/ or /ˈpɪzɨfɔrm/), also called pisiforme bone (Latin), is a small knobbly, pea-shaped sesamoid bone that is found in the wrist. It forms the ulnar border of the carpal tunnel.

Structure[edit]

The pisiform bone is a small sesamoid bone found in the proximal row of the carpus. It is contained within the flexor carpi ulnaris tendon.[1]:199,205

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).

Surfaces[edit]

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 palmar 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.

Function[edit]

Unlike the other carpal bones, the pisiform is not involved in movement of the wrist.[2] :5

History[edit]

The etymology derives from the Latin pīsum which means "pea".

See also[edit]

This article uses anatomical terminology; for an overview, see anatomical terminology.

Additional images[edit]

References[edit]

  1. ^ Tim D. White, Human Osteology, 2nd edition (San Diego: Academic Press, 2000)
  2. ^ Beasley's Surgery of the Hand. Thieme New York. 2003. ISBN 9781282950023. 

External links[edit]