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[[Image:Os_pisiforme.GIF|left|thumb|300px|pisiform]] | [[Image:Os_pisiforme.GIF|left|thumb|300px|pisiform]] | ||
The | The '''pisiform bone (os pisiforme)''' can be distinguished by its small size, and having a single articular facet. It is pea-shaped and is situated anteriorly to the other bones of the wrist. Its dorsal surface presents a smooth, oval facet, for articulation with the triquetral bone. This facet approaches the superior, but not the inferior border of the bone. The palmar (volar) surface is rounded and rough, giving 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. | ||
Articulation | Articulation: the pisiform bone articulates only with one other bone, the triquetral. | ||
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." | 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." | ||
Revision as of 20:39, 25 February 2007
pisiform bone (os pisiforme)
parent article - wrist or carpus
The pisiform bone (os pisiforme) can be distinguished by its small size, and having a single articular facet. It is pea-shaped and is situated anteriorly to the other bones of the wrist. Its dorsal surface presents a smooth, oval facet, for articulation with the triquetral bone. This facet approaches the superior, but not the inferior border of the bone. The palmar (volar) surface is rounded and rough, giving 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.
Articulation: the pisiform bone articulates only with one other bone, the triquetral.
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 plantar (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.
Topics in Anatomy
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