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An ontogenetic framework linking locomotion and trabecular bone architecture with applications for reconstructing hominin life history.
Raichlen, David A; Gordon, Adam D; Foster, Adam D; Webber, James T; Sukhdeo, Simone M; Scott, Robert S; Gosman, James H; Ryan, Timothy M.
Afiliación
  • Raichlen DA; School of Anthropology, University of Arizona, Tucson, AZ 85721, USA. Electronic address: raichlen@email.arizona.edu.
  • Gordon AD; Department of Anthropology, University at Albany, Albany, NY 12222, USA.
  • Foster AD; School of Anthropology, University of Arizona, Tucson, AZ 85721, USA.
  • Webber JT; School of Anthropology, University of Arizona, Tucson, AZ 85721, USA.
  • Sukhdeo SM; Department of Anthropology, Pennsylvania State University, University Park, PA 16802, USA.
  • Scott RS; Department of Anthropology and Center for Human Evolutionary Studies, Rutgers University, New Brunswick, NJ 08901, USA.
  • Gosman JH; Department of Anthropology, The Ohio State University, Columbus, OH 43210-1106, USA.
  • Ryan TM; Department of Anthropology, Pennsylvania State University, University Park, PA 16802, USA; Center for Quantitative Imaging, EMS Energy Institute, Pennsylvania State University, University Park, PA 16802, USA.
J Hum Evol ; 81: 1-12, 2015 Apr.
Article en En | MEDLINE | ID: mdl-25743432
The ontogeny of bipedal walking is considered uniquely challenging, due in part to the balance requirements of single limb support. Thus, locomotor development in humans and our bipedal ancestors may track developmental milestones including the maturation of the neuromuscular control system. Here, we examined the ontogeny of locomotor mechanics in children aged 1-8, and bone growth and development in an age-matched skeletal sample to identify bony markers of locomotor development. We show that step-to-step variation in mediolateral tibia angle relative to the vertical decreases with age, an indication that older children increase stability. Analyses of trabecular bone architecture in the distal tibia of an age-matched skeletal sample (the Norris Farms #36 archaeological skeletal collection) show a bony signal of this shift in locomotor stability. Using a grid of eleven cubic volumes of interest (VOI) in the distal metaphysis of each tibia, we show that the degree of anisotropy (DA) of trabecular struts changes with age. Intra-individual variation in DA across these VOIs is generally high at young ages, likely reflecting variation in loading due to kinematic instability. With increasing age, mean DA converges on higher values and becomes less variable across the distal tibia. We believe the ontogeny of distal tibia trabecular architecture reflects the development of locomotor stability in bipeds. We suggest this novel bony marker of development may be used to assess the relationship between locomotor development and other life history milestones in fossil hominins.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tibia / Caminata / Evolución Biológica Tipo de estudio: Prognostic_studies Límite: Animals / Child / Child, preschool / Female / Humans / Infant / Male País/Región como asunto: America do norte Idioma: En Revista: J Hum Evol Año: 2015 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tibia / Caminata / Evolución Biológica Tipo de estudio: Prognostic_studies Límite: Animals / Child / Child, preschool / Female / Humans / Infant / Male País/Región como asunto: America do norte Idioma: En Revista: J Hum Evol Año: 2015 Tipo del documento: Article Pais de publicación: Reino Unido