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  The talar morphology of a hypochondroplasic dwarf: A case study from the Italian Late Antique period

Sorrentino, R., Carlson, K. J., Figus, C., Pietrobelli, A., Stephens, N. B., DeMars, L. J. D., et al. (2021). The talar morphology of a hypochondroplasic dwarf: A case study from the Italian Late Antique period. International Journal of Osteoarchaeology, 3078. doi:10.1002/oa.3078.

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 Creators:
Sorrentino, Rita, Author
Carlson, Kristian J., Author
Figus, Carla, Author
Pietrobelli, Annalisa, Author
Stephens, Nicholas B., Author
DeMars, Lily J. D., Author
Saers, Jaap P. P., Author
Armando, Jessica, Author
Bettuzzi, Matteo, Author
Guarnieri, Tiziana, Author
Oxilia, Gregorio, Author
Vazzana, Antonino, Author
Parr, William, Author
Turley, Kevin, Author
Morigi, Maria Pia, Author
Stock, Jay T.1, Author              
Ryan, Timothy M., Author
Benazzi, Stefano, Author
Marchi, Damiano, Author
Belcastro, Maria Giovanna, Author
Affiliations:
1Archaeology, Max Planck Institute for the Science of Human History, Max Planck Society, ou_2074312              

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Free keywords: antero-lateral talar facet, functional morphology, geometric morphometrics, skeletal dysplasia, trabecular analysis
 Abstract: Abstract This project aims to test whether geometric morphometric (GM) and trabecular analyses may be useful tools in identifying talar characteristics related to hypochondroplasia. We quantified the external and internal talar morphology of a hypochondroplasic dwarf (T17) from Modena (northern Italy) dated to the sixth century AD. External talar morphology of T17 was compared with a broad sample of modern human tali (n?=?159) using GM methods. Additionally, a subsample of these tali (n?=?41) was used to investigate whole talar trabecular changes in T17. Our results show that GM and trabecular analyses identify a combination of traits linked to the dwarfing disorder of hypochondroplasia. These traits include decreased scaled talar dimensions compared with normal-sized individuals, presence of an accessory antero-lateral talar facet, high bone volume fraction, and high anisotropy values throughout the entire talus. In our case study, hypochondroplasia does not appear to substantially modify external talar morphology probably due to the fast growth of the talus. We suggest that small talar dimensions are associated with hypochondroplasia. An antero-lateral talar facet may result from the talus and calcaneus coalition (i.e., talocalcaneal abnormal bridging) possibly related to an everted foot posture that was limited by overgrowth of the fibula. We suggest that high talar trabecular density and strut orientation provide insights into pathological development of the trabecular plates in T17. Finally, our study suggests that high talar trabecular density and strut orientation, and small talar dimensions, may be added as possible concomitant talar hallmarks for hypochondroplasia.

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Language(s): eng - English
 Dates: 2021-12-14
 Publication Status: Published online
 Pages: 15
 Publishing info: -
 Table of Contents: 1 Introduction
2 Materials and methods
3 Results
3.1 Talar size
3.2 External talar shape
3.3 Internal talar structure
4 Discussion
4.1 Talar size
4.2 External talar shape
4.3 Internal trabecular structure
5 Conclusion
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/oa.3078
Other: shh3117
 Degree: -

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Title: International Journal of Osteoarchaeology
Source Genre: Journal
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Publ. Info: New York, NY : John Wiley & Sons
Pages: - Volume / Issue: - Sequence Number: 3078 Start / End Page: - Identifier: ISSN: 1047-482X
CoNE: https://pure.mpg.de/cone/journals/resource/954925592443