Pisiform bone

Pisiform bone
Bone: Pisiform bone
Carpus.png
Shown is the right hand, palm down (left) and palm up (right).
Proximal: A=Scaphoid, B=Lunate, C=Triquetral, D=Pisiform
Distal: E=Trapezium, F=Trapezoidium, G=Capitate, H=Hamate
Gray224.png
The left pisiform bone
Latin os pisiforme
Gray's subject #54 225
Origins ulnar collateral ligament
Articulations triangular  
MeSH Pisiform+Bone

The pisiform bone (also called pisiforme 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 when in anatomical position) 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 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.

See also

Additional images

  • Bones of the left hand. Palmar surface.

  • Bones of the left hand. Dorsal surface.

  • The muscles of the left hand. Palmar surface.

  • Pisiform as seen on a lateral hand Xray

External links


v · d · eBones of upper limbs (TA A02.4, GA 2.200–230)
Pectoral girdle,
clavicle
Scapula
Humerus
Forearm
Hand

M: BON/CAR

anat(c/f/k/f, u, t/p, l)/phys/devp/cell

noco/cong/tumr, sysi/epon, injr

proc, drug(M5)

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Look at other dictionaries:

  • pisiform bone — noun a small wrist bone that articulates only with the triquetral • Syn: ↑pisiform, ↑os pisiforme • Hypernyms: ↑carpal bone, ↑carpal, ↑wrist bone * * * pisiform bone, a pea shaped bone of the human wrist ( …   Useful english dictionary

  • pisiform bone — the smallest bone of the wrist (carpus): a pea shaped bone that articulates with the triquetral bone and, indirectly by cartilage, with the ulna. * * * os pisiforme …   Medical dictionary

  • pisiform bone — the smallest bone of the wrist (carpus): a pea shaped bone that articulates with the triquetral bone and, indirectly by cartilage, with the ulna …   The new mediacal dictionary

  • pisiform bone — noun A small knobbly, pea shaped sesamoid bone of the wrist. Syn: os pisiforme, lentiform bone …   Wiktionary

  • pisiform — Pea shaped or pea sized. [L. pisum, pea, + forma, appearance] * * * pi·si·form pī sə .fȯrm adj resembling a pea in size or shape <pisiform granules> pisiform n a bone on the little finger side of the carpus that articulates with the… …   Medical dictionary

  • pisiform — 1. adjective Resembling a pea in size or shape 2. noun A small bone in the wrist at the junction of the ulna and the carpus …   Wiktionary

  • pisiform — adj. pea shaped. Phrases and idioms: pisiform bone a small bone in the wrist in the upper row of the carpus. Etymology: mod.L pisiformis f. pisum pea …   Useful english dictionary

  • Bone — is the substance that forms the skeleton of the body. It is composed chiefly of calcium phosphate and calcium carbonate. It also serves as a storage area for calcium, playing a large role in calcium balance in the blood. The 206 bones in the body …   Medical dictionary

  • Pisiform — Pi si*form, n. (Anat.) A small bone on the ulnar side of the carpus in man and many mammals. See Illust. of {Artiodactyla}. [1913 Webster] …   The Collaborative International Dictionary of English

  • pisiform — [pī′si fôrm΄] adj. [< L pisum,PEA + FORM] resembling a pea in shape and size n. a small bone on the inner side of the wrist that resembles half a pea …   English World dictionary

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