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[The cubito-carpal region in gibbons]
Bulletin De L'Association Des Anatomistes
|December 1, 1976
Summary
This study questions the homology of the os Daubentonii in gibbons with human fetal carpal structures. It proposes a functional role for the os Daubentonii as a sesamoid bone in gibbon hand biomechanics.
Area of Science:
- Comparative anatomy
- Primate evolution
- Developmental biology
Context:
- Building upon previous research on human carpal articular disc development.
- Utilizing serial sections of a late-fetal gibbon hand specimen.
Purpose:
- To investigate the disc-homologue in gibbons.
- To establish the stratigraphical position of the os Daubentonii.
- To functionally interpret the os Daubentonii.
Summary:
- The study examined the os Daubentonii in fetal gibbons, comparing its position to the human ulno-carpal region.
- The presumed homology of the os Daubentonii with human fetal carpal structures was found questionable.
- A functional interpretation of the os Daubentonii as a sesamoid bone supporting pronation and supination in gibbons was proposed.
Impact:
- Challenges existing theories on primate carpal bone homology.
- Offers a new functional perspective on the os Daubentonii in gibbon hand biomechanics.
- Contributes to understanding primate evolutionary adaptations in hand structure and function.