Supplementary material from "Assessing the manipulative potentials of monkeys, apes and humans from hand proportions: implications for hand evolution"
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Posted on 2016-12-06 - 11:24
The hand structure possesses a greater potential for performing manipulative
skills than is typically observed, whether in humans or non-human
anthropoids. However, a precise assessment of the potential manipulative
skills of hands has been challenging, which hampers our understanding of
the evolution of manipulative abilities in anthropoid hands. Here, we establish a functional model to quantitatively infer the manipulative potentials of anthropoid hands based on hand proportions. Our results reveal a large disparity of manipulative potentials among anthropoid hands. From the aspect of hand proportions, the human hand has the best manipulative potential among anthropoids. However, the species with a manipulative potential closer to that of humans are not our nearest relatives, chimpanzees, but rather, are certain monkey species. In combination with the phylogenetically informed morphometric analyses, our results suggest that the morphologicalchanges of non-human anthropoid hands did not coevolve with the brain to facilitate the manipulative ability during the evolutionary process, although the manipulative ability is a survival skill. The changes in non-human anthropoid hands may have more likely evolved under selective pressure for locomotion than manipulation.
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Liu, Ming-Jin; Xiong, Cai-Hua; Hu, Di (2016). Supplementary material from "Assessing the manipulative potentials of monkeys, apes and humans from hand proportions: implications for hand evolution". The Royal Society. Collection. https://doi.org/10.6084/m9.figshare.c.3575744.v4