Search Results - "DeSilva, Jeremy M"
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shift toward birthing relatively large infants early in human evolution
Published in Proceedings of the National Academy of Sciences - PNAS (18-01-2011)“…It has long been argued that modern human mothers give birth to proportionately larger babies than apes do. Data presented here from human and chimpanzee…”
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Functional morphology of the ankle and the likelihood of climbing in early hominins
Published in Proceedings of the National Academy of Sciences - PNAS (21-04-2009)“…Whether early hominins were adept tree climbers is unclear. Although some researchers have argued that bipedality maladapts the hominin skeleton for climbing,…”
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The evolution of the human foot
Published in Evolutionary anthropology (01-09-2018)“…There are 26 bones in each foot (52 in total), meaning that roughly a quarter of the human skeleton consists of foot bones. Yet, early hominin foot fossils are…”
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Revisiting the "midtarsal break"
Published in American journal of physical anthropology (01-02-2010)“…The midtarsal break was first described in this journal nearly 75 years ago to explain the ability of non‐human primates to lift their heel independently of…”
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Reconstructing birth in Australopithecus sediba
Published in PloS one (18-09-2019)“…Hominin birth mechanics have been examined and debated from limited and often fragmentary fossil pelvic material. Some have proposed that birth in the early…”
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Homo naledi, a new species of the genus Homo from the Dinaledi Chamber, South Africa
Published in eLife (10-09-2015)“…Homo naledi is a previously-unknown species of extinct hominin discovered within the Dinaledi Chamber of the Rising Star cave system, Cradle of Humankind,…”
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The obstetric dilemma: An ancient game of Russian roulette, or a variable dilemma sensitive to ecology?
Published in American journal of physical anthropology (2012)“…The difficult birth process of humans, often described as the “obstetric dilemma,” is commonly assumed to reflect antagonistic selective pressures favoring…”
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Anatomy, Development, and Function of the Human Pelvis
Published in Anatomical record (Hoboken, N.J. : 2007) (01-04-2017)“…ABSTRACT The pelvis is an anatomically complex and functionally informative bone that contributes directly to both human locomotion and obstetrics. Because of…”
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Footprint evidence of early hominin locomotor diversity at Laetoli, Tanzania
Published in Nature (London) (16-12-2021)“…Bipedal trackways discovered in 1978 at Laetoli site G, Tanzania and dated to 3.66 million years ago are widely accepted as the oldest unequivocal evidence of…”
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A comparative study of the trabecular bony architecture of the talus in humans, non-human primates, and Australopithecus
Published in Journal of human evolution (01-09-2012)“…This study tested the hypothesis that talar trabecular microarchitecture reflects the loading patterns in the primate ankle joint, to determine whether talar…”
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Homoplasy in the evolution of modern human-like joint proportions in Australopithecus afarensis
Published in eLife (12-05-2021)“…The evolution of bipedalism and reduced reliance on arboreality in hominins resulted in larger lower limb joints relative to the joints of the upper limb. The…”
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Lucy's flat feet: the relationship between the ankle and rearfoot arching in early hominins
Published in PloS one (28-12-2010)“…In the Plio-Pleistocene, the hominin foot evolved from a grasping appendage to a stiff, propulsive lever. Central to this transition was the development of the…”
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Brain size at birth throughout human evolution: A new method for estimating neonatal brain size in hominins
Published in Journal of human evolution (01-12-2008)“…An increase in brain size is a hallmark of human evolution. Questions regarding the evolution of brain development and obstetric constraints in the human…”
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Bipedal locomotion in zoo apes: Revisiting the hylobatian model for bipedal origins
Published in Evolutionary human sciences (01-01-2022)“…Bipedal locomotion is a hallmark of being human. Yet the body form from which bipedalism evolved remains unclear. Specifically, the positional behaviour (i.e…”
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Downclimbing and the evolution of ape forelimb morphologies
Published in Royal Society open science (06-09-2023)“…The forelimbs of hominoid primates (apes) are decidedly more flexible than those of monkeys, especially at the shoulder, elbow and wrist joints. It is tempting…”
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Mechanical loading of primate fingers on vertical rock surfaces
Published in South African Journal of Science (01-11-2021)“…rock walls is attested by several populations of baboons, one of which uses a 7-m ver tical surface to enter for estimating the probability of extreme…”
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Neonatal Shoulder Width Suggests a Semirotational, Oblique Birth Mechanism in Australopithecus afarensis
Published in Anatomical record (Hoboken, N.J. : 2007) (01-05-2017)“…ABSTRACT Birth mechanics in early hominins are often reconstructed based on cephalopelvic proportions, with little attention paid to neonatal shoulders. Here,…”
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Osteogenic relationship between the lateral plantar process and the peroneal tubercle in the human calcaneus
Published in Journal of anatomy (01-02-2014)“…The osteogenic relationship between the lateral plantar process and the peroneal tubercle has been an uncertainty for researchers over several decades. While…”
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Phenotypic Plasticity of Climbing-Related Traits in the Ankle Joint of Great Apes and Rainforest Hunter-Gatherers
Published in Human biology (01-02-2013)“…The “negrito” and African “pygmy” phenotypes are predominately exhibited by hunter-gatherers living in rainforest habitats. Foraging within such habitats is…”
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Comment on "The growth pattern of Neandertals, reconstructed from a juvenile skeleton from El Sidrón (Spain)"
Published in Science (American Association for the Advancement of Science) (09-03-2018)“…Rosas (Reports, 22 September 2017, p. 1282) calculate El Sidrón J1 to have reached only 87.5% of its adult brain size. This finding is based on an…”
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