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Ruff CB, Wallace IJ, Toya C, Muñoz MAP, Meyer JV, Busby T, Reynolds AZ, Martinez J, Miller-Moore M, Rios R. The effects of the industrial transition on lower limb bone structure: A comparison of the inhabitants of Pecos Pueblo and present-day Indigenous peoples of New Mexico. AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY 2024; 184:e24922. [PMID: 38409941 DOI: 10.1002/ajpa.24922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/01/2024] [Accepted: 02/13/2024] [Indexed: 02/28/2024]
Abstract
OBJECTIVES Comparisons between Indigenous peoples over time and within a particular geographic region can shed light on the impact of environmental transitions on the skeleton, including relative bone strength, sexual dimorphism, and age-related changes. Here we compare long bone structural properties of the inhabitants of the late prehistoric-early historic Pecos Pueblo with those of present-day Indigenous individuals from New Mexico. MATERIALS AND METHODS Femora and tibiae of 126 adults from Pecos Pueblo and 226 present-day adults were included in the study. Cross-sectional diaphyseal properties-areas and second moments of area-were obtained from past studies of the Pecos Pueblo skeletal sample, and from computed tomography scans of recently deceased individuals in the present-day sample. RESULTS Femora and tibiae from Pecos individuals are stronger relative to body size than those of present-day Indigenous individuals. Present-day individuals are taller but not wider, and this body shape difference affects cross-sectional shape, more strongly proximally. The tibia shows anteroposterior strengthening among Pecos individuals, especially among males. Sexual dimorphism in midshaft bone shape is stronger within the Pecos Pueblo sample. With aging, Pecos individuals show more medullary expansion but also more subperiosteal expansion than present-day individuals, maintaining bone strength despite cortical thinning. DISCUSSION Higher activity levels, carried out over rough terrain and throughout adult life, likely explain the relatively stronger lower limb bones of the Pecos individuals, as well as their greater subperiosteal expansion with aging. Greater sexual dimorphism in bone structure among Pecos individuals potentially reflects greater gender-based differences in behavioral patterns.
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Affiliation(s)
- Christopher B Ruff
- Center for Functional Anatomy and Evolution, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Ian J Wallace
- Department of Anthropology, University of New Mexico, Albuquerque, New Mexico, USA
| | | | | | - Jana Valesca Meyer
- Department of Anthropology, University of New Mexico, Albuquerque, New Mexico, USA
| | - Taylor Busby
- Department of Anthropology, University of New Mexico, Albuquerque, New Mexico, USA
| | - Adam Z Reynolds
- Department of Anthropology, University of New Mexico, Albuquerque, New Mexico, USA
| | - Jordan Martinez
- Department of Anthropology, University of New Mexico, Albuquerque, New Mexico, USA
| | - Marcus Miller-Moore
- Department of Anthropology, University of New Mexico, Albuquerque, New Mexico, USA
| | - Roberto Rios
- Department of Anthropology, University of New Mexico, Albuquerque, New Mexico, USA
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Mazza B. Postcranial morphological variation between hunter‐gatherers and horticulturalists from the lower Paraná River Delta, Argentina. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2019; 170:176-195. [DOI: 10.1002/ajpa.23889] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 06/08/2019] [Accepted: 06/17/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Bárbara Mazza
- Instituto Nacional de Antropología y Pensamiento Latinoamericano, CONICET Buenos Aires Argentina
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Cowgill LW, Johnston RA. Biomechanical implications of the onset of walking. J Hum Evol 2018; 122:133-145. [DOI: 10.1016/j.jhevol.2018.06.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 05/30/2018] [Accepted: 06/01/2018] [Indexed: 11/30/2022]
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Hora M, Soumar L, Pontzer H, Sládek V. Body size and lower limb posture during walking in humans. PLoS One 2017; 12:e0172112. [PMID: 28192522 PMCID: PMC5305206 DOI: 10.1371/journal.pone.0172112] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 01/31/2017] [Indexed: 12/03/2022] Open
Abstract
We test whether locomotor posture is associated with body mass and lower limb length in humans and explore how body size and posture affect net joint moments during walking. We acquired gait data for 24 females and 25 males using a three-dimensional motion capture system and pressure-measuring insoles. We employed the general linear model and commonality analysis to assess the independent effect of body mass and lower limb length on flexion angles at the hip, knee, and ankle while controlling for sex and velocity. In addition, we used inverse dynamics to model the effect of size and posture on net joint moments. At early stance, body mass has a negative effect on knee flexion (p < 0.01), whereas lower limb length has a negative effect on hip flexion (p < 0.05). Body mass uniquely explains 15.8% of the variance in knee flexion, whereas lower limb length uniquely explains 5.4% of the variance in hip flexion. Both of the detected relationships between body size and posture are consistent with the moment moderating postural adjustments predicted by our model. At late stance, no significant relationship between body size and posture was detected. Humans of greater body size reduce the flexion of the hip and knee at early stance, which results in the moderation of net moments at these joints.
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Affiliation(s)
- Martin Hora
- Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Prague, Czech Republic
- * E-mail:
| | - Libor Soumar
- CASRI - Sports Research Institute of Czech Armed Forces, Prague, Czech Republic
| | - Herman Pontzer
- Department of Anthropology, Hunter College, New York, New York, United States of America
| | - Vladimír Sládek
- Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Prague, Czech Republic
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Impact of secular trends on sex assessment evaluated through femoral dimensions of the Czech population. Forensic Sci Int 2016; 262:284.e1-6. [DOI: 10.1016/j.forsciint.2016.02.042] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 02/20/2016] [Accepted: 02/22/2016] [Indexed: 11/20/2022]
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Harrington KI, Wescott DJ. Size and shape differences in the distal femur and proximal tibia between normal weight and obese American Whites. J Forensic Sci 2014; 60 Suppl 1:S32-8. [PMID: 25274066 DOI: 10.1111/1556-4029.12579] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 11/14/2013] [Accepted: 12/14/2013] [Indexed: 11/30/2022]
Abstract
This study tests for differences in articular and diaphyseal size and shape of the distal femur and proximal tibia between normal weight and obese individuals, and discusses the effects of obesity on the patterns of sexual dimorphism and secular change in the skeletal morphology of the knee. Measurements of the femur and tibia were recorded for 143 American White adult males and females born in the 20th century. The sample was divided into normal and obese weight categories based on the body mass index. Results show differences between normal weight and obese individuals in the size and shape of the femoral shaft and the medial side of the knee joint, none of which affect the pattern of sexual dimorphism. While changes in skeletal morphology associated with obesity may be observed in recent secular changes, its role is still unclear because of the relatively recent increase in obesity prevalence.
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Influence of lower limb configuration on walking cost in Late Pleistocene humans. J Hum Evol 2014; 67:19-32. [PMID: 24485350 DOI: 10.1016/j.jhevol.2013.09.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2012] [Revised: 07/26/2013] [Accepted: 09/01/2013] [Indexed: 11/23/2022]
Abstract
It has been proposed that Neandertals had about 30% higher gross cost of transport than anatomically modern humans (AMH) and that such difference implies higher daily energy demands and reduced foraging ranges in Neandertals. Thus, reduced walking economy could be among the factors contributing to the Neandertals' loss in competition with their anatomically modern successors. Previously, Neandertal walking cost had been estimated from just two parameters and based upon a pooled-sex sample. In the present study, we estimate sex-specific walking cost of Neandertals using a model accounting for body mass, lower limb length, lower limb proportions, and other features of lower limb configuration. Our results suggest that Neandertals needed more energy to walk a given distance than did AMH but the difference was less than half of that previously estimated in males and even far less pronounced in females. In contrast, comparison of the estimated walking cost adjusted to body mass indicates that Neandertals spent less energy per kilogram of body mass than AMH thanks to their lower limb configuration, males having 1-5% lower and females 1-3% lower mass-specific net cost of transport than AMH of the same sex. The primary cause of high cost of transport in Neandertal males is thus their great body mass, possibly a consequence of adaptation to cold, which was not fully offset by their cost-moderating lower limb configuration. The estimated differences in absolute energy spent for locomotion between Neandertal and AMH males would account for about 1% of previously estimated daily energy expenditure of Neandertal or AMH males.
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Hora M, Sládek V, Soumar L, stráníková K, Michálek T. Influence of body mass and lower limb length on knee flexion angle during walking in humans. FOLIA ZOOLOGICA 2012. [DOI: 10.25225/fozo.v61.i3.a15.2012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Martin Hora
- Department of Anthropology and Human Genetics, Faculty of Science, Charles University in Prague, Viničná 7, 128 43 Prague 2, Czech Republic
| | - Vladimír Sládek
- Department of Anthropology and Human Genetics, Faculty of Science, Charles University in Prague, Viničná 7, 128 43 Prague 2, Czech Republic
- Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, v.v.i., Květná 8, 603 65 Brno, Czech Republic
| | - Libor Soumar
- CASRI - Sports Research Institute of Czech Armed Forces, Podbabská 3, 160 00 Prague 6, Czech Republic
| | - Kateřina stráníková
- Department of Anthropology and Human Genetics, Faculty of Science, Charles University in Prague, Viničná 7, 128 43 Prague 2, Czech Republic
| | - Tomáš Michálek
- CASRI - Sports Research Institute of Czech Armed Forces, Podbabská 3, 160 00 Prague 6, Czech Republic
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Shaw CN, Stock JT. The influence of body proportions on femoral and tibial midshaft shape in hunter-gatherers. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2011; 144:22-9. [PMID: 20623683 DOI: 10.1002/ajpa.21363] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Variation in femoral and tibial diaphyseal shape is used as an indicator of adaptation to patterns of terrestrial mobility. Recent experimentation has implied that lower limb diaphyseal shape may be primarily influenced by lower limb length, and less so by mobility patterns. If valid, this would, at most, render previous interpretations of mobility patterns based on analyses of diaphyseal shape questionable, and, at least, require additional standardization that considers the influence of limb length. Although the consequences could be profound, this implication has yet to be directly tested. Additionally, the influence of body breadth on tibial shape (and to a lesser extent femoral shape) remains uncertain. Tibial and femoral cross-sectional midshaft shape measurements, taken from nine Pleistocene and Holocene skeletal populations, were compared against lower limb length, limb segment length, and bi-iliac breadth. Generally, limb length and limb segment length do not significantly influence femoral or tibial midshaft shape. After controlling for body mass greater bi-iliac breadth is associated with a relative mediolateral strengthening of the femoral midshaft, while the influence of a wider body shape (BIB/length) is associated with a relative M-L strengthening of the tibia and femur of males, and the tibia of females. We conclude that; (1) mechanical interpretations of lower limb diaphyseal shape are most parsimonious due to the lack of evidence for a consistent relationship between segment length and shape; however, (2) further work is required to investigate the influence of bi-iliac breadth on both femoral and tibial midshaft shape.
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Affiliation(s)
- Colin N Shaw
- Department of Anthropology and The Center for Quantitative Imaging, Pennsylvania State University, State College, PA 16802, USA.
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Young JW. Ontogeny of joint mechanics in squirrel monkeys (Saimiri boliviensis): functional implications for mammalian limb growth and locomotor development. J Exp Biol 2009; 212:1576-91. [PMID: 19411552 PMCID: PMC2777092 DOI: 10.1242/jeb.025460] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Juvenile animals must often compete against adults for common resources, keep pace during group travel and evade common predators, despite reduced body size and an immature musculoskeletal system. Previous morphometric studies of a diverse array of mammals, including jack rabbits, cats and capuchin monkeys, have identified growth-related changes in anatomy, such as negative allometry of limb muscle mechanical advantage, which should theoretically permit young mammals to overcome such ontogenetic limits on performance. However, it is important to evaluate the potential impact of such ;compensatory' growth trajectories within the context of developmental changes in locomotor behavior. I used standard kinematic and kinetic techniques to investigate the ontogenetic scaling of joint postures, substrate reaction forces, joint load arm lengths and external joint moments in an ontogenetic sample of squirrel monkeys (Saimiri boliviensis). Results indicated that young squirrel monkeys were frequently able to limit forelimb and hind limb joint loading via a combination of changes in limb posture and limb force distribution, potentially compensating for limited muscularity at younger ages. These results complement previous morphometric studies and suggest that immature mammals may utilize a combination of behavioral and anatomical mechanisms to mitigate ontogenetic limits on locomotor performance. However, ontogenetic changes in joint posture, not limb length per se, explained most of the variation in load arm lengths and joint loading in growing squirrel monkeys, indicating the importance of incorporating both anatomical and performance measures when studying the ontogeny of limb joint mechanics.
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Affiliation(s)
- Jesse W Young
- Department of Anthropology, University of Texas at Austin, Austin, TX 78712, USA.
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