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  The implications of thumb movements for Neanderthal and modern human manipulation

Bardo, A., Moncel, M.-H., Dunmore, C. J., Kivell, T. L., Pouydebat, E., & Cornette, R. (2020). The implications of thumb movements for Neanderthal and modern human manipulation. Scientific Reports, 10: 19323. doi:10.1038/s41598-020-75694-2.

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Bardo_The-implications_SciRep_2020.pdf (Publisher version), 2MB
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Bardo_The-implications_SciRep_2020.pdf
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Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Bardo, Ameline, Author
Moncel, Marie-Hélène, Author
Dunmore, Christopher J., Author
Kivell, Tracy L.1, Author                 
Pouydebat, Emmanuelle, Author
Cornette, Raphaël, Author
Affiliations:
1Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, ou_1497673              

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 Abstract: Much research has debated the technological abilities of Neanderthals relative to those of early modern humans, with a particular focus on subtle differences in thumb morphology and how this may reflect differences in manipulative behaviors in these two species. Here, we provide a novel perspective on this debate through a 3D geometric morphometric analysis of shape covariation between the trapezial and proximal first metacarpal articular surfaces of Neanderthals (Homo neanderthalensis) in comparison to early and recent humans (Homo sapiens). Results show a distinct pattern of shape covariation in Neanderthals, consistent with more extended and adducted thumb postures that may reflect habitual use of grips commonly used for hafted tools. Both Neanderthals and recent humans demonstrate high intraspecific variation in shape covariation. This intraspecific variation is likely the result of genetic and/or developmental differences, but may also reflect, in part, differing functional requirements imposed by the use of varied tool-kits. These results underscore the importance of holistic joint shape analysis for understanding the functional capabilities and evolution of the modern human thumb.

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Language(s): eng - English
 Dates: 2020-11-26
 Publication Status: Published online
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 Rev. Type: Peer
 Identifiers: DOI: 10.1038/s41598-020-75694-2
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Title: Scientific Reports
Source Genre: Journal
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Pages: - Volume / Issue: 10 Sequence Number: 19323 Start / End Page: - Identifier: ISBN: 2045-2322