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[The pisiform bone: sesamoid or carpal bone?]

O May1

  • 1Institut d'Anatomie de Paris.

Annales De Chirurgie De La Main Et Du Membre Superieur : Organe Officiel Des Societes De Chirurgie De La Main = Annals of Hand and Upper Limb Surgery
|January 1, 1996
PubMed
Summary
This summary is machine-generated.

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The pisiform bone

Area of Science:

  • Anatomy
  • Evolutionary Biology
  • Paleontology

Context:

  • The pisiform bone's unique anatomical position and late ossification present an evolutionary puzzle.
  • Existing theories on the pisiform's origin include sesamoid development, polydactyly, and variations in pentadactyl hand evolution.

Purpose:

  • To review and evaluate existing theories regarding the evolutionary origin of the human pisiform bone.
  • To present the most plausible theory for the pisiform's development within the carpus.

Summary:

  • The pisiform bone is an unusual carpal bone, located anteriorly and within the flexor carpi ulnaris tendon.
  • The most likely theory suggests the pisiform originated from the central carpal series of a 12-bone ancestral carpus, with medial displacement of an ulnar element.

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Impact:

  • This research clarifies the evolutionary trajectory of the human carpus.
  • Understanding the pisiform's origin contributes to a comprehensive model of human skeletal evolution.