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pisiform bone (os pisiforme)

parent article - wrist or carpus

The Pisiform Bone (os pisiforme) 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. 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. 10

Articulation.—The pisiform articulates with one bone, the triangular.

Volar: Pertaining to both the palm and sole. It comes from word "vola" which the ancient Romans used for "the palm of the hand and the sole of the foot."

cf palmar (palm side of hand)and planar (sole of foot)

The Triangular Bone (os triquetrum; cuneiform bone)

By comparison, the term "palm" applies to only the palm (the grasping side) of the hand. The Romans actually used the word "palma" for the outstretched palm of the hand.

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