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Shaft structure of the first metatarsal contains a strong phylogenetic signal in apes and humans.
Tomizawa, Yuma; Nakatsukasa, Masato; Ponce de León, Marcia S; Zollikofer, Christoph P E; Morimoto, Naoki.
Afiliación
  • Tomizawa Y; Laboratory of Physical Anthropology, Graduate School of Science, Kyoto University, Kyoto, Japan.
  • Nakatsukasa M; Laboratory of Physical Anthropology, Graduate School of Science, Kyoto University, Kyoto, Japan.
  • Ponce de León MS; Department of Informatics, University of Zurich, Zurich, Switzerland.
  • Zollikofer CPE; Department of Informatics, University of Zurich, Zurich, Switzerland.
  • Morimoto N; Laboratory of Physical Anthropology, Graduate School of Science, Kyoto University, Kyoto, Japan.
Am J Biol Anthropol ; 185(1): e24987, 2024 Sep.
Article en En | MEDLINE | ID: mdl-38922796
ABSTRACT

OBJECTIVES:

Metatarsal bones constitute a key functional unit of the foot in primates. While the form-function relationships of metatarsals have been extensively studied, particularly in relation to the loss of the grasping ability of the foot in humans in contrast to apes, the effect of phyletic history on the metatarsal morphology and its variability remains largely unknown. MATERIALS AND

METHODS:

Here, we evaluate how the strength of the phylogenetic signal varies from the first to the fifth metatarsal in humans, chimpanzees, gorillas, orangutans, gibbons, and Japanese macaques. We use computed tomography imaging and morphometric mapping to quantify the second moment of area around and along the metatarsal shaft and evaluate the strength of the phylogenetic signal with multivariate K-statistics.

RESULTS:

The shaft structure of the first metatarsal, but not the others, correlates well with the phylogeny of apes and humans.

DISCUSSION:

Given the importance of the first metatarsal for grasping and bipedal/quadrupedal locomotion, the strong phylogenetic but weak functional signal in its structure is unexpected. These findings suggest that the evolutionary diversification of hominoid locomotor behaviors, including human bipedality, is only partly reflected in form-function relationships of key skeletal elements, and that phylogenetic history acted as a major evolutionary constraint.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Filogenia / Huesos Metatarsianos / Hominidae Límite: Adult / Animals / Female / Humans / Male Idioma: En Revista: Am J Biol Anthropol Año: 2024 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Filogenia / Huesos Metatarsianos / Hominidae Límite: Adult / Animals / Female / Humans / Male Idioma: En Revista: Am J Biol Anthropol Año: 2024 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos