Shape variation in the human pelvis and limb skeleton
Implications for obstetric adaptation
Bibliographic Data
| ID | 8319601 |
|---|---|
| Authors | Helen Kurki (0000-0001-9789-6584, University of Victoria, corresponding author), Helen K Kurki (Department of Anthropology University of Victoria Victoria BC V8P 5C2 Canada), Sarah‐louise Decrausaz (0000-0001-7048-7596, Division of Biological Anthropology Department of Archaeology and Anthropology University of Cambridge Cambridge CB2 3QG) |
| Year | 2016 |
| Volume | 159 |
| Issue | 4 |
| Pages | 630-638 |
| Publication date | 2016-04-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | American Journal of Physical Anthropology (JOURNAL) |
| Journal identifiers | ISSN: 0002-9483 • E-ISSN: 1096-8644 |
| Publisher | Wiley (PUBLISHER • GB) |
| DOI | 10.1002/ajpa.22922 |
| PMID | 26699269 |
| OpenAlex | W2214388263 |
| Language | EN |
| Citations received | 17 |
| References cited | 76 |
OBJECTIVES: Under the obstetrical dilemma (OD) hypothesis, selection acts on the human female pelvis to ensure a sufficiently sized obstetric canal for birthing a large-brained, broad shouldered neonate, while bipedal locomotion selects for a narrower and smaller pelvis. Despite this female-specific stabilizing selection, variability of linear dimensions of the pelvic canal and overall size are not reduced in females, suggesting shape may instead be variable among females of a population. Female canal shape has been shown to vary among populations, while male canal shape does not. Within this context, we examine within-population canal shape variation in comparison with that of noncanal aspects of the pelvis and the limbs. MATERIALS AND METHODS: Nine skeletal samples (total female n = 101, male n = 117) representing diverse body sizes and shapes were included. Principal components analysis was applied to size-adjusted variables of each skeletal region. A multivariate variance was calculated using the weighted PC scores for all components in each model and F-ratios used to assess differences in within-population variances between sexes and skeletal regions. RESULTS: Within both sexes, multivariate canal shape variance is significantly greater than noncanal pelvis and limb variances, while limb variance is greater than noncanal pelvis variance in some populations. Multivariate shape variation is not consistently different between the sexes in any of the skeletal regions. DISCUSSION: Diverse selective pressures, including obstetrics, locomotion, load carrying, and others may act on canal shape, as well as genetic drift and plasticity, thus increasing variation in morphospace while protecting obstetric sufficiency
Biology · Birth canal · Context (archaeology) · Multivariate analysis · Multivariate statistics · Pelvis · Population · Pregnancy · Skeleton (computer programming) · Statistics · Anatomy · Demography · Forensic Anthropology and Bioarchaeology Studies · Mathematics · Morphological variations and asymmetry · Orthodontics and Dentofacial Orthopedics
The Evolutionary Biology of the Human Pelvis
Developmental origins of variability in pelvic dimensions
Moving Beyond the Obstetrical Dilemma Hypothesis
Sexual dimorphism in populations of Southern Siberia
Similarities in pelvic dimorphisms across populations
Obstetric dimensions of the female pelvis are less integrated than locomotor dimensions and show protective scaling patterns
Does obstetric protection apply to small‐bodied females
Influence of climatic stress on nonmetric sexually dimorphic features of the skull and pelvis
Patterns of directional asymmetry in the pelvis and pelvic canal
Pelvic and neonatal size correlations in light of evolutionary hypotheses
Shape analyses and the human skeleton
A geometric morphometric assessment of shape variation in adult pelvic morphology
Energetic cost of walking in fossil hominins
Sexual dimorphism of the relationship between the gut and pelvis in humans
Age estimation of immature human skeletal remains from the dimensions of the girdle bones in the postnatal period
Ilium morphological variation during growth in forager populations
Homo naledi pelvic remains from the Dinaledi Chamber, South Africa
Divergent Patterns of Integration and Reduced Constraint in the Human Hip and the Origins of Bipedalism
Canonical and principal components of shape
Canalization of Development and the Inheritance of Acquired Characters
Trade-Offs in Relative Limb Length among Peruvian Children
Neandertal birth canal shape and the evolution of human childbirth
Tools and Human Evolution
Developmental Constraints and Evolution
Metabolic hypothesis for human altriciality
Size and Shape
Compromised skeletal growth? Small body size and clinical contraction thresholds for the female pelvic canal
Postcranial evidence of cold adaptation in European Neandertals
Rapid change in height and body proportions of Maya American children
Bipedalism and human birth
Postcranial evidence of cold adaptation in European Neandertals
Skeletal variability in the pelvis and limb skeleton of humans
Levels of Intraspecific Variation Within the Catarrhine Skeleton
Who's afraid of the big bad Wolff
Natural selection and developmental sexual variation in the human pelvis
The biology of the colonizing ape
Relationships of maternal and paternal anthropometry with neonatal body size, proportions and adiposity in an Australian cohort
The obstetric dilemma
Sex differences in the pubic bone
Sex differences in the pelves of primates
Body proportions of circumpolar peoples as evidenced from skeletal data
Protection of obstetric dimensions in a small‐bodied human sample
Infant carrying
Bony pelvic canal size and shape in relation to body proportionality in humans
Body size among Holocene foragers of the Cape Ecozone, southern Africa
Allometry of head and body size in holocene foragers of the south african cape
Shape, relative size, and size-adjustments in morphometrics
Variation in pelvic size between males and females
Primate cranial diversity
Adult proportionality in small‐bodied foragers
Sexual dimorphism in the size and shape of the os coxae and the effects of microevolutionary processes
Genetic variations and physical activity as determinants of limb bone morphology
Technical note
Big-bodied males help us recognize that females have big pelves
Morphological adaptation to climate in modern and fossil hominids
Sex differences in the growth of the human bony pelvis
Sexual dimorphism in the human bony pelvis, with a consideration of the Neandertal pelvis from Kebara cave, Israel
Selective pressures in the human bony pelvis
DSP
Human Pelvis and Long Bones Reveal Differential Preservation of Ancient Population History and Migration Out of Africa
The primate pelvis
Functional aspects of pelvic morphology in simian Primates
Hunter-gatherer postcranial robusticity relative to patterns of mobility, climatic adaptation, and selection for tissue economy
Pelvic dimorphism in relation to body size and body size dimorphism in humans
Extreme mobility in the Late Pleistocene? Comparing limb biomechanics among fossil Homo, varsity athletes and Holocene foragers
Reproductive costs for everyone
Understanding the comparative catarrhine context of human pelvic form
Complex and changing patterns of natural selection explain the evolution of the human hip
Sexual dimorphism in the pelvic midplane and its relationship to Neandertal reproductive patterns
Adult females and pubic bone growth
Energetics, Locomotion, and Female Reproduction
| Unique citing works | 17 |
|---|---|
| Citations per year | 1,7 |
| Citation span | 2016 - 2026 (11) |
| Citation velocity | current |
| Highly cited | No |
| Citation types | Neutral: 17 |