1
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Yaussy SL. Using craniofacial fluctuating asymmetry to examine the effects of sex, socioeconomic status, and early life experiences on adult age at death in industrial England. AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY 2024; 184:e24907. [PMID: 38380869 DOI: 10.1002/ajpa.24907] [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: 08/11/2023] [Revised: 12/09/2023] [Accepted: 01/17/2024] [Indexed: 02/22/2024]
Abstract
OBJECTIVES Historical evidence from 18th- and 19th-century England suggests that industrialization's impacts on health were largely negative, especially among marginalized groups. However, available documentary evidence is often biased toward adult men and rarely sheds light on the experiences of other members of the population, such as women and children. Craniofacial fluctuating asymmetry (FA) can serve as a proxy measurement of developmental instability and stress during development. This study examines the associations among age, sex, socioeconomic status (SES), and FA in skeletal samples from industrial-era England. MATERIALS AND METHODS The sample for this study comes from four industrial-era cemeteries from England (A.D. 1711-1857). Geometric morphometric analyses of three-dimensional landmark coordinate data were used to generate a measure of FA for each individual (Mahalanobis distance). A three-way ANOVA was used to evaluate the impacts of sex, SES, and FA scores on adult age at death (n = 168). RESULTS Significant associations existed between age at death and SES (p = 0.004) and FA scores (p = 0.094). Comparisons of the estimated means indicated that age at death was consistently higher among high SES individuals and individuals with FA scores less than one standard deviation from the mean. CONCLUSIONS This study supports findings from previous studies that have suggested that the differences in resource access and environmental buffering generated by socioeconomic inequality can impact longevity and patterns of mortality among socioeconomic status groups. Likewise, stress in early life-evinced by craniofacial fluctuating asymmetry-can influence observed patterns of longevity in adults decades later.
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Affiliation(s)
- Samantha L Yaussy
- Department of Sociology and Anthropology, James Madison University, Harrisonburg, Virginia, USA
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2
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Brzezinski ET, Hubbe M, Hunter RL, Agnew AM. Sex differences in workload in medieval Poland: Patterns of asymmetry and biomechanical adaptation in the upper limb at Giecz. AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY 2024; 183:e24886. [PMID: 38130087 DOI: 10.1002/ajpa.24886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 09/29/2023] [Accepted: 11/28/2023] [Indexed: 12/23/2023]
Abstract
OBJECTIVES This study characterizes sexual dimorphism in skeletal markers of upper limb mechanical loading due to lateralization as evidence of division of labor in medieval Giecz, Poland. METHODS Twenty-six dimensions for paired humeri, clavicles, and radii representing adult males (n = 89) and females (n = 53) were collected from a skeletal sample from the cemetery site Gz4. Percent directional asymmetry (DA) and absolute asymmetry (AA) for each dimension were compared among bones, osteometric subcategories, and sex. Additionally, side bias and sex differences were assessed in degenerative joint disease (DJD) and entheseal changes (ECs). RESULTS Nearly all measurements revealed significant asymmetry favoring the right side. Asymmetry was most pronounced in midshaft dimensions with few sex differences. There were more correlations among dimensions within elements than between elements, mainly in the midshaft. No laterality in DJD frequencies was noted for either sex, but females demonstrated significantly lower odds of having DJD than males in most joints. Most ECs demonstrated a right-bias and association with DA with no sex-specific patterns except the biceps brachii insertion, where females were ~5 times more likely to be scored "right" than males. DISCUSSION The general lack of sex differences in asymmetry and ECs suggests similarly demanding workloads for females and males, with the exception of sex-specific functional loading differences in the forearm. Further, DJD data suggest males engaged in more intensive activities involving the upper limb. These results enhance understanding of workload in this important historical period and provide a comparison for asymmetry in past populations.
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Affiliation(s)
- Emma T Brzezinski
- Department of Anthropology, The Ohio State University, Columbus, Ohio, USA
- Skeletal Biology Research Lab, The Ohio State University, Columbus, Ohio, USA
| | - Mark Hubbe
- Department of Anthropology, The Ohio State University, Columbus, Ohio, USA
| | - Randee L Hunter
- Department of Anthropology, The Ohio State University, Columbus, Ohio, USA
- Skeletal Biology Research Lab, The Ohio State University, Columbus, Ohio, USA
| | - Amanda M Agnew
- Department of Anthropology, The Ohio State University, Columbus, Ohio, USA
- Skeletal Biology Research Lab, The Ohio State University, Columbus, Ohio, USA
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3
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Anthropometric fluctuating asymmetries in living humans through the eyes of an anthropologist. Emerg Top Life Sci 2022; 6:323-331. [PMID: 35916213 DOI: 10.1042/etls20210276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 07/21/2022] [Accepted: 07/25/2022] [Indexed: 11/17/2022]
Abstract
There are many environmental and genetic factors that disrupt the stable structure of development in organisms. Although the strength of these vary, they leave certain signs in the body structure. Fluctuating asymmetry is a widely used population-level index of developmental instability, developmental noise, and robustness. Many bilateral traits are used in fluctuating asymmetry studies in humans. These traits include dermatoglyphics, limb lengths and widths, bilateral facial characters, and teeth. In this review, I evaluate the measurement methods of many bilateral anthropometric characters, taken from the bodies of living individuals with classical digital calipers.
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4
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Investigating Human Torso Asymmetries: An Observational Longitudinal Study of Fluctuating and Directional Asymmetry in the Scoliotic Torso. Symmetry (Basel) 2021. [DOI: 10.3390/sym13101821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The presence of directional and fluctuating asymmetry in adolescent idiopathic scoliosis has not been deeply studied. We aimed to test the presence of both in a scoliosis group and a control group. 24 patients with adolescent idiopathic scoliosis and 24 control subjects were subjected to geometric morphometrics analyses to address our main hypotheses and to make qualitative visualizations of the 3D shape changes in patients with scoliosis. Our results support the hypothesis that both asymmetric traits are present in the scoliosis and control groups, but to a greater degree in patients. A qualitative visualization tool that allows us to measure the impact that directional and fluctuating asymmetry have on the 3D shape of our patients has been developed. Adolescent idiopathic scoliosis is the result of developmental instabilities during growth and the visualization of the 3D shape changes in response to both asymmetric variables has shown different morphological behaviors. Measuring these variables is important, as they can prevent the localization and deformation that is expected to occur during the course of scoliosis in every individual patient and therefore acts as a key clinical finding that may be used in the prognosis of the condition.
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5
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Mazzamuto MV, Su HJ, Guidarelli G, Preatoni D, Russo LF, Loy A, Martinoli A. Mandible morphology as a tool to investigate origin, adaptation and stress in invasive alien species: first insights into Callosciurus erythraeus (Rodentia: Sciuridae) in Europe. THE EUROPEAN ZOOLOGICAL JOURNAL 2021. [DOI: 10.1080/24750263.2021.1943548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Affiliation(s)
- M. V. Mazzamuto
- Environment Analysis and Management Unit, Guido Tosi Research Group, Department of Theoretical and Applied Sciences, University of Insubria, Varese, Italy
- School of Natural Resources and Environment, University of Arizona, Tucson, AZ, USA
| | - H.-J. Su
- Department of Forestry, Guizhou University, Guiyang City, Guizhou Province, PR China
| | - G. Guidarelli
- Department of Biosciences and Territory, University of Molise, Campobasso, Italy
| | - D. Preatoni
- Environment Analysis and Management Unit, Guido Tosi Research Group, Department of Theoretical and Applied Sciences, University of Insubria, Varese, Italy
| | - L. F. Russo
- Department of Biosciences and Territory, University of Molise, Campobasso, Italy
| | - A. Loy
- Department of Biosciences and Territory, University of Molise, Campobasso, Italy
| | - A. Martinoli
- Environment Analysis and Management Unit, Guido Tosi Research Group, Department of Theoretical and Applied Sciences, University of Insubria, Varese, Italy
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6
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Oxilia G, Menghi Sartorio JC, Bortolini E, Zampirolo G, Papini A, Boggioni M, Martini S, Marciani F, Arrighi S, Figus C, Marciani G, Romandini M, Silvestrini S, Pedrosi ME, Mori T, Riga A, Kullmer O, Sarig R, Fiorenza L, Giganti M, Sorrentino R, Belcastro MG, Cecchi JM, Benazzi S. Exploring directional and fluctuating asymmetry in the human palate during growth. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2021; 175:847-864. [PMID: 33973654 PMCID: PMC8360102 DOI: 10.1002/ajpa.24293] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 03/23/2021] [Accepted: 04/09/2021] [Indexed: 01/20/2023]
Abstract
Objectives Palate morphology is constantly changing throughout an individual's lifespan, yet its asymmetry during growth is still little understood. In this research, we focus on the study of palate morphology by using 3D geometric morphometric approaches to observe changes at different stages of life, and to quantify the impact of directional and fluctuating asymmetry on different areas at different growth stages. Materials and Methods The sample consists of 183 individuals (1–72 years) from two identified human skeletal collections of 19th and early 20th Century Italian contexts. A 3D‐template of 41 (semi)landmarks was applied on digital palate models to observe morphological variation during growth. Results Asymmetrical components of the morphological structure appears multidirectional on the entire palate surface in individuals <2 years old and become oriented (opposite bilateral direction) between 2 and 6 years of age. Specifically, directional asymmetry differentially impacts palate morphology at different stages of growth. Both the anterior and posterior palate are affected by mild alterations in the first year of life, while between 2 and 6 years asymmetry is segregated in the anterior area, and moderate asymmetry affects the entire palatal surface up to 12 years of age. Our results show that stability of the masticatory system seems to be reached around 13–35 years first by females and then males. From 36 years on both sexes show similar asymmetry on the anterior area. Regarding fluctuating asymmetry, inter‐individual variability is mostly visible up to 12 years of age, after which only directional trends can be clearly observed at a group level. Discussion Morphological structure appears instable during the first year of life and acquires an opposite asymmetric bilateral direction between 2 and 6 years of age. This condition has been also documented in adults; when paired with vertical alteration, anterior/posterior asymmetry seems to characterize palate morphology, which is probably due to mechanical factors during the lifespan. Fluctuating asymmetry is predominant in the first period of life due to a plausible relationship with the strength of morphological instability of the masticatory system. Directional asymmetry, on the other hand, shows that the patterning of group‐level morphological change might be explained as a functional response to differential inputs (physiological forces, nutritive and non‐nutritive habits, para‐masticatory activity as well as the development of speech) in different growth stages. This research has implications with respect to medical and evolutionary fields. In medicine, palate morphology should be considered when planning orthodontic and surgical procedures as it could affect the outcome. As far as an evolutionary perspective is concerned the dominance of directional asymmetries in the masticatory system could provide information on dietary and cultural habits as well as pathological conditions in our ancestors.
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Affiliation(s)
- Gregorio Oxilia
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - Jessica C Menghi Sartorio
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy.,Department of Enterprise Engineering, "Mario Lucertini" - Tor Vergata University, Rome, Italy
| | - Eugenio Bortolini
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - Giulia Zampirolo
- Section for Evolutionary Genomics Øster Farimagsgade, University of Copenhagen, København, Denmark
| | - Andrea Papini
- Dentist's Surgery, via Walter Tobagi 35, Prato, 59100, Italy
| | - Marco Boggioni
- Dentist's Surgery, via D'Andrade 34/207, Genoa Sestri Ponente, 16154, Italy
| | - Sergio Martini
- Dental Lab Technician, via Milani, 1, Verona, 37124, Italy
| | - Filippo Marciani
- Dentist's Surgery, Studio Dentistico Marciani Dr. Filippo, Via Romagnoli, 14, Lanciano, 66034, Italy
| | - Simona Arrighi
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - Carla Figus
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - Giulia Marciani
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - Matteo Romandini
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - Sara Silvestrini
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - Maria Elena Pedrosi
- Department of Biological, Geological and Environmental Sciences-, BiGeA University of Bologna, Bologna, Italy
| | - Tommaso Mori
- Department of Biology, University of Florence, Florence, Italy
| | - Alessandro Riga
- Department of Biology, University of Florence, Florence, Italy
| | - Ottmar Kullmer
- Senckenberg Research Institute, Senckenberganlage 25, Frankfurt am Main, 60325, Germany.,Department of Paleobiology and Environment, Institute of Ecology, Evolution, and Diversity, Johann Wolfgang Goethe University, Frankfurt, Germany
| | - Rachel Sarig
- Department of Oral biology, The Goldschleger School of Dental Medicine and the Dan David Center for Human Evolution, the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Luca Fiorenza
- Monash Biomedicine Discovery Institute, Department of Anatomy and Developmental Biology, Monash University, Melbourne, Victoria, Australia
| | - Melchiore Giganti
- Department of Morphology, Surgery and Experimental Medicine, University of Ferrara, Ferrara, Italy.,Radiology University Unit, University Hospital, Ferrara, Italy
| | - Rita Sorrentino
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy.,Department of Biological, Geological and Environmental Sciences-, BiGeA University of Bologna, Bologna, Italy
| | - Maria Giovanna Belcastro
- Department of Biological, Geological and Environmental Sciences-, BiGeA University of Bologna, Bologna, Italy
| | | | - Stefano Benazzi
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy.,Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
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7
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Ward DL, Schroeder L, Pomeroy E, Roy JE, Buck LT, Stock JT, Martin-Gronert M, Ozanne SE, Silcox MT, Viola TB. Early life malnutrition and fluctuating asymmetry in the rat bony labyrinth. Anat Rec (Hoboken) 2021; 304:2645-2660. [PMID: 33586866 DOI: 10.1002/ar.24601] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/18/2021] [Accepted: 01/22/2021] [Indexed: 12/26/2022]
Abstract
Maternal malnutrition during gestation and lactation is known to have adverse effects on offspring. We evaluate the impact of maternal diet on offspring bony labyrinth morphology. The bony labyrinth develops early and is thought to be stable to protect vital sensory organs within. For these reasons, bony labyrinth morphology has been used extensively to assess locomotion, hearing function, and phylogeny in primates and numerous other taxa. While variation related to these parameters has been documented, there is still a component of intraspecific variation that is unexplained. Although the labyrinthine developmental window is small, it may provide the opportunity for developmental instability to produce corresponding shape differences, as measured by fluctuating asymmetry (FA). We hypothesized that (a) offspring with poor maternal diet would exhibit increased FA, but (b) no unilateral shape difference. To test these hypotheses, we used two groups of rats (Rattus norvegicus; Crl:WI[Han] strain), one control group and one group exposed to a isocaloric, protein-restricted maternal diet during gestation and suckling. Individuals were sampled at weaning, sexual maturity, and old age. A Procrustes analysis of variance identified statistically significant FA in all diet-age subgroups. No differences in level of FA were identified among the subgroups, rejecting our first hypothesis. A principal components analysis identified no unilateral shape differences, supporting our second hypothesis. These results indicate that bony labyrinth morphology is remarkably stable and likely protected from a poor maternal diet during development. In light of this result, other factors must be explored to explain intraspecific variation in labyrinthine shape.
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Affiliation(s)
- Devin L Ward
- Department of Anthropology, University of Toronto, Toronto, Ontario, Canada
| | - Lauren Schroeder
- Department of Anthropology, University of Toronto Mississauga, Mississauga, Ontario, Canada
| | - Emma Pomeroy
- Department of Archaeology, University of Cambridge, Cambridge, UK
| | - Jocelyn E Roy
- Department of Anthropology, University of Toronto, Toronto, Ontario, Canada
| | - Laura T Buck
- Department of Archaeology, University of Cambridge, Cambridge, UK
- School of Biological and Environmental Sciences, Liverpool John Moores University, Liverpool, UK
| | - Jay T Stock
- Department of Anthropology, Western University, London, Ontario, Canada
- Department of Archaeology, Max Planck Institute for the Science of Human History, Jena, Germany
| | - Malgorzata Martin-Gronert
- Metabolic Research Laboratories and MRC Metabolic Diseases Unit, University of Cambridge, Cambridge, UK
| | - Susan E Ozanne
- Metabolic Research Laboratories and MRC Metabolic Diseases Unit, University of Cambridge, Cambridge, UK
| | - Mary T Silcox
- Department of Anthropology, University of Toronto Scarborough, Scarborough, Ontario, Canada
| | - T Bence Viola
- Department of Anthropology, University of Toronto, Toronto, Ontario, Canada
- Institute for Archaeology and Ethnography, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
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8
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Krzykała M, Karpowicz M, Strzelczyk R, Pluta B, Podciechowska K, Karpowicz K. Morphological asymmetry, sex and dominant somatotype among Polish youth. PLoS One 2020; 15:e0238706. [PMID: 32915820 PMCID: PMC7485883 DOI: 10.1371/journal.pone.0238706] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 08/21/2020] [Indexed: 11/19/2022] Open
Abstract
The aim of the present study was to determine the level of morphological asymmetry among the general population of Polish youth as it correlates to sex and body type. The anthropometric characteristics of a group of 618 Polish youths (354 males aged 19.5 ± 1.2 years and 264 females aged 19.2 ± 1.2 years) were evaluated to assess their somatotypes using the Heath-Carter method. Body composition was calculated using the bioelectrical impedance method, and the absolute asymmetry index was used for comparisons between the right and left sides of the body. Significant differentiation was observed between all morphological characteristics (≤ 0.0001) and two body types (≤ 0.0001) among sexes. Females and males largely exhibited endomorphic and mesomorphic somatotypes, respectively. The findings demonstrated that dominant somatotype and sex both affect the level of fat mass asymmetry in the arms and legs. Furthermore, significant variations in the levels of asymmetry between sexes were observed in fat mass in both the arms and legs, with greater variation observed in the arms. In the case of muscle mass, no great differences were observed between men, women, or body types. This study provides new data on the morphological asymmetry of given body composition according to somatotype and sex. This study has potential medical implications, given that a large degree of inter-limb imbalance could be shown to have a negative effect on health; the findings of the present study would therefore be important for arriving at an understanding of how to prevent such imbalances, or to mitigate their negative effects.
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Affiliation(s)
- Magdalena Krzykała
- Department of Recreation, Poznan University of Physical Education, Poznan, Poland
- * E-mail:
| | - Małgorzata Karpowicz
- Department of Theory and Methodology of Team Sport Games, Poznan University of Physical Education, Poznan, Poland
| | - Ryszard Strzelczyk
- Department of Theory of Sport, Poznan University of Physical Education, Poznan, Poland
| | - Beata Pluta
- Department of Recreation, Poznan University of Physical Education, Poznan, Poland
| | | | - Krzysztof Karpowicz
- Department of Theory of Sport, Poznan University of Physical Education, Poznan, Poland
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9
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Burdukiewicz A, Pietraszewska J, Andrzejewska J, Chromik K, Stachoń A. Asymmetry of Musculature and Hand Grip Strength in Bodybuilders and Martial Artists. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17134695. [PMID: 32629826 PMCID: PMC7370066 DOI: 10.3390/ijerph17134695] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 06/25/2020] [Accepted: 06/27/2020] [Indexed: 11/16/2022]
Abstract
The functional preference for the upper limb influences the occurrence of bilateral differences in other segments of the human body. The aim of the study is to assess the influence of the applied fighting technique and targeted physical effort on the occurrence of asymmetry in body musculature and isometric strength in bodybuilders and competitors of selected martial arts. Academic athletes practicing judo (J), jiu-jitsu (JJ), and bodybuilding (BB) were examined. The control group (C) consisted of students who do not practice any sports. The assessment of the body structure was conducted through segmental bioelectrical impedance analysis. Moreover, the study took into account the measurements of left- and right-hand grip strength. In judo, the uneven physical exertion of the right and left sides of the body further increases both directional and absolute asymmetry. Bilateral asymmetry of musculature in jiu-jitsu competitors and bodybuilders occurs to a lesser extent. The control group was characterized by cross-asymmetry. So as to avoid the risk of injury of sportsmen, it is important to consistently supervise and correct their body structure, which also includes the symmetrical participation of the active muscle mass in particular segments. The symmetrisation process should be individualized since each particular sportsman has their own side-to-side body morphology.
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10
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Ekrami O, Claes P, White JD, Weinberg SM, Marazita ML, Walsh S, Shriver MD, Dongen SV. A Multivariate Approach to Determine the Dimensionality of Human Facial Asymmetry. Symmetry (Basel) 2020; 12:348. [PMID: 33569240 PMCID: PMC7872143 DOI: 10.3390/sym12030348] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Many studies have suggested that developmental instability (DI) could lead to asymmetric development, otherwise known as fluctuating asymmetry (FA). Several attempts to unravel the biological meaning of FA have been made, yet the main step in estimating FA is to remove the effects of directional asymmetry (DA), which is defined as the average bilateral asymmetry at the population level. Here, we demonstrate in a multivariate context that the conventional method of DA correction does not adequately compensate for the effects of DA in other dimensions of asymmetry. This appears to be due to the presence of between-individual variation along the DA dimension. Consequently, we propose to decompose asymmetry into its different orthogonal dimensions, where we introduce a new measure of asymmetry, namely fluctuating directional asymmetry (F-DA). This measure describes individual variation in the dimension of DA, and can be used to adequately correct the asymmetry measurements for the presence of DA. We provide evidence that this measure can be useful in disentangling the different dimensions of asymmetry, and further studies on this measure can provide valuable insight into the underlying biological processes leading to these different asymmetry dimensions.
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Affiliation(s)
- Omid Ekrami
- Evolutionary Ecology Group, Department of Biology, University of Antwerp, 2610 Antwerp, Belgium; stefan
| | - Peter Claes
- Department of Electrical Engineering, ESAT/PSI, KU Leuven, 3000 Leuven, Belgium
- Medical Imaging Research Center, UZ Leuven, 3000 Leuven, Belgium
- Department of Human Genetics, KU Leuven, 3000 Leuven, Belgium
| | - Julie D. White
- Department of Anthropology, Pennsylvania State University, University Park, State College, PA 16801, USA
| | - Seth M. Weinberg
- Department of Oral Biology, Center for Craniofacial and Dental Genetics, University of Pittsburgh, Pittsburgh, PA 15260, USA
- Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Mary L. Marazita
- Department of Oral Biology, Center for Craniofacial and Dental Genetics, University of Pittsburgh, Pittsburgh, PA 15260, USA
- Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Susan Walsh
- Department of Biology, Indiana University Purdue University Indianapolis (IUPUI), Indianapolis, IN 46202, USA
| | - Mark D. Shriver
- Department of Anthropology, Pennsylvania State University, University Park, State College, PA 16801, USA
| | - Stefan Van Dongen
- Evolutionary Ecology Group, Department of Biology, University of Antwerp, 2610 Antwerp, Belgium; stefan
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11
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Fluctuating body asymmetry in young Polish women in relation to childhood socioeconomic status. J Biosoc Sci 2019; 51:775-783. [DOI: 10.1017/s0021932019000099] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
AbstractThe aim of this study was to analyse the relationship between childhood socioeconomic conditions and body asymmetry in young Polish women. The study measured fluctuating asymmetry (FA), which refers to small random deviations from perfect symmetry in bilaterally paired body structures. Data were obtained from 620 female students aged from 19 to 25 years recruited from Jagiellonian University in Cracow, Poland. The research was carried out in the period from January 2016 to May 2017. A composite fluctuating asymmetry (cFA) of the women was calculated using five bilateral body traits. The lengths and widths of the women’s ears, lengths of their 2nd and 4th digits and wrist widths of the right and left sides of the body were measured twice using standard methodology. The following data were collected in a questionnaire: degree of urbanization of the woman’s place of residence during childhood, number of older siblings, parental education and woman’s dominant hand. The results showed a tendency for FA to fall with an increase in parental education, and to rise with an increase in number of older siblings. The level of FA was significantly lower in women from rural areas than in those from cities. The results of the study show that FA in early adulthood is significantly associated with socioeconomic status during childhood, and confirm that the level of FA in adulthood may be a good indicator of stress factors in the early stages of development.
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12
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Asymmetry patterns are associated with body size and somatic robustness among adult !Kung San and Kavango people. ANTHROPOLOGICAL REVIEW 2019. [DOI: 10.2478/anre-2019-0004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Asymmetry of bilateral anatomical structures is widely found in nature. Fluctuating asymmetry, i.e. mostly tiny random deviations from perfect symmetry in bilateral structures, is mainly interpreted within the framework of developmental instability. This interpretation is mainly due to the fact, that higher fluctuating asymmetry is often found in association with various pathological conditions but also from increased stress during somatic development. Directional asymmetry, in contrast, describes a distinct pattern of bilateral variation in a group of individuals, characterized by the tendency to find the larger side mainly at the same side for all individuals. This kind of asymmetry is mostly caused by behavioral lateralization. Somatic stress during development affect not only asymmetry patterns, it is has also an adverse effect on somatic growth. Therefore, the present study tested the hypothesis, that increased asymmetry is associated with decreased body height as well as postcranial length and robustness dimensions. The association patterns between fluctuating as well as directional asymmetry and parameters of somatic growth and robustness are analyzed among 236 !Kung San and 248 Kavango people of Namibia between the ages of 18 and 65 years. Fluctuating asymmetry was determined by ear length and ear breadth. Directional asymmetry was determined by hand length and hand breadth dimensions. Fluctuating as well as directional asymmetry correlated significantly negatively with body height and length dimensions, the correlations however, were weak. The results are interpreted as a corroboration of the theory that developmental stress may increase fluctuating asymmetry but on the other hand may decrease body size.
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13
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Rolfe S, Lee SI, Shapiro L. Associations Between Genetic Data and Quantitative Assessment of Normal Facial Asymmetry. Front Genet 2018; 9:659. [PMID: 30631343 PMCID: PMC6315129 DOI: 10.3389/fgene.2018.00659] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 12/03/2018] [Indexed: 11/13/2022] Open
Abstract
Human facial asymmetry is due to a complex interaction of genetic and environmental factors. To identify genetic influences on facial asymmetry, we developed a method for automated scoring that summarizes local morphology features and their spatial distribution. A genome-wide association study using asymmetry scores from two local symmetry features was conducted and significant genetic associations were identified for one asymmetry feature, including genes thought to play a role in craniofacial disorders and development: NFATC1, SOX5, NBAS, and TCF7L1. These results provide evidence that normal variation in facial asymmetry may be impacted by common genetic variants and further motivate the development of automated summaries of complex phenotypes.
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Affiliation(s)
- Sara Rolfe
- Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA, United States
| | - Su-In Lee
- Department of Genome Sciences, University of Washington, Seattle, WA, United States.,Department of Computer Science, University of Washington, Seattle, WA, United States
| | - Linda Shapiro
- Department of Computer Science, University of Washington, Seattle, WA, United States
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Human Bodily Asymmetry Relates to Behavioral Lateralization and May not Reliably Reflect Developmental Instability. Symmetry (Basel) 2018. [DOI: 10.3390/sym10040117] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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15
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Ibrová A, Dupej J, Stránská P, Velemínský P, Poláček L, Velemínská J. Facial skeleton asymmetry and its relationship to mastication in the Early Medieval period (Great Moravian Empire, Mikulčice, 9th–10th century). Arch Oral Biol 2017; 84:64-73. [DOI: 10.1016/j.archoralbio.2017.09.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 09/14/2017] [Accepted: 09/17/2017] [Indexed: 11/29/2022]
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16
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Gawlikowska-Sroka A, Dabrowski P, Szczurowski J, Dzieciolowska-Baran E, Staniowski T. Influence of physiological stress on the presence of hypoplasia and fluctuating asymmetry in a medieval population from the village of Sypniewo. INTERNATIONAL JOURNAL OF PALEOPATHOLOGY 2017; 19:43-52. [PMID: 29198399 DOI: 10.1016/j.ijpp.2017.10.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 10/03/2017] [Accepted: 10/09/2017] [Indexed: 06/07/2023]
Abstract
This study aims to estimate the levels of physiological stress in the medieval rural population of Sypniewo by evaluating patterns of fluctuating asymmetry (FA) and enamel hypoplasia (EH), and provide information on the influence of physiological stress during the prenatal and perinatal period on early childhood development. Stress is defined as any external or internal condition that challenges homeostasis of an organism. FA is associated with physiological stress occurring mainly during prenatal development and early childhood. The level of FA is thought to reflect the intensity of the stressor(s). EH is caused by physiological stress such as nutritional instability during the first years of life. The studied material consisted of 126 skulls from the village of Sypniewo (Poland). Cranial radiographs were taken in postero-anterior (P-A) and basal views. The images were scanned and calibrated. Measurements of the cranium were used to estimate FA. The presence of EH was assessed using standard anthropological methods The highest levels of FA were observed in the region of the cranial base. EH was observed in 29% of individuals from the rural skeletal series. There was no statistically significant correlation between FA and EH occurrence or between sex and the studied stress indicators.
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Affiliation(s)
| | - Pawel Dabrowski
- Department of Anatomy, Wroclaw Medical University, ul. Chalubinskiego 6a, 50-368 Wroclaw, Poland.
| | - Jacek Szczurowski
- Department of Anthropology, Wroclaw University of Environmental and Life Sciences, ul. Kozuchowska 5, 51-631 Wroclaw, Poland
| | | | - Tomasz Staniowski
- Department of Conservative Dentistry and Pedodontics, Wroclaw Medical University, ul. Krakowska 26, 50-425 Wroclaw, Poland
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Androgen Levels and Body Size Are Associated with Directional as Well as Fluctuating Asymmetry Patterns in Adult !Kung San and Kavango Males from Northern Namibia. Symmetry (Basel) 2017. [DOI: 10.3390/sym9050072] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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18
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Developmental Origins of Limb Developmental Instability in Human Fetuses: Many Abnormalities Make the Difference. Symmetry (Basel) 2017. [DOI: 10.3390/sym9040051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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19
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Quinto-Sánchez M, Cintas C, Silva de Cerqueira CC, Ramallo V, Acuña-Alonzo V, Adhikari K, Castillo L, Gomez-Valdés J, Everardo P, De Avila F, Hünemeier T, Jaramillo C, Arias W, Fuentes M, Gallo C, Poletti G, Schuler-Faccini L, Bortolini MC, Canizales-Quinteros S, Rothhammer F, Bedoya G, Rosique J, Ruiz-Linares A, González-José R. Socioeconomic Status Is Not Related with Facial Fluctuating Asymmetry: Evidence from Latin-American Populations. PLoS One 2017; 12:e0169287. [PMID: 28060876 PMCID: PMC5218465 DOI: 10.1371/journal.pone.0169287] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 12/14/2016] [Indexed: 11/18/2022] Open
Abstract
The expression of facial asymmetries has been recurrently related with poverty and/or disadvantaged socioeconomic status. Departing from the developmental instability theory, previous approaches attempted to test the statistical relationship between the stress experienced by individuals grown in poor conditions and an increase in facial and corporal asymmetry. Here we aim to further evaluate such hypothesis on a large sample of admixed Latin Americans individuals by exploring if low socioeconomic status individuals tend to exhibit greater facial fluctuating asymmetry values. To do so, we implement Procrustes analysis of variance and Hierarchical Linear Modelling (HLM) to estimate potential associations between facial fluctuating asymmetry values and socioeconomic status. We report significant relationships between facial fluctuating asymmetry values and age, sex, and genetic ancestry, while socioeconomic status failed to exhibit any strong statistical relationship with facial asymmetry. These results are persistent after the effect of heterozygosity (a proxy for genetic ancestry) is controlled in the model. Our results indicate that, at least on the studied sample, there is no relationship between socioeconomic stress (as intended as low socioeconomic status) and facial asymmetries.
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Affiliation(s)
- Mirsha Quinto-Sánchez
- Grupo de Investigación en Biología Evolutiva Humana, Instituto Patagónico de Ciencias Sociales y Humanas, Centro Nacional Patagónico, CONICET. Puerto Madryn, Chubut, Argentina
- Ciencia Forense, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Celia Cintas
- Grupo de Investigación en Biología Evolutiva Humana, Instituto Patagónico de Ciencias Sociales y Humanas, Centro Nacional Patagónico, CONICET. Puerto Madryn, Chubut, Argentina
| | - Caio Cesar Silva de Cerqueira
- Grupo de Investigación en Biología Evolutiva Humana, Instituto Patagónico de Ciencias Sociales y Humanas, Centro Nacional Patagónico, CONICET. Puerto Madryn, Chubut, Argentina
- Ciencia Forense, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
- Superintendência da Polícia Técnico-Científica do Estado de São Paulo. Equipe de Perícias Criminalísticas de Ourinhos, São Paulo, Brazil
| | - Virginia Ramallo
- Grupo de Investigación en Biología Evolutiva Humana, Instituto Patagónico de Ciencias Sociales y Humanas, Centro Nacional Patagónico, CONICET. Puerto Madryn, Chubut, Argentina
| | - Victor Acuña-Alonzo
- Department of Genetics, Evolution and Environment, and UCL Genetics Institute, University College London, London, United Kingdom
- Escuela Nacional de Antropología e Historia. Instituto Nacional de Antropología e Historia, Ciudad de México, México
| | - Kaustubh Adhikari
- Department of Genetics, Evolution and Environment, and UCL Genetics Institute, University College London, London, United Kingdom
| | - Lucía Castillo
- Grupo de Investigación en Biología Evolutiva Humana, Instituto Patagónico de Ciencias Sociales y Humanas, Centro Nacional Patagónico, CONICET. Puerto Madryn, Chubut, Argentina
| | - Jorge Gomez-Valdés
- Posgrado en Antropología Física, Escuela Nacional de Antropología e Historia, Ciudad de México, México
| | - Paola Everardo
- Escuela Nacional de Antropología e Historia. Instituto Nacional de Antropología e Historia, Ciudad de México, México
| | - Francisco De Avila
- Escuela Nacional de Antropología e Historia. Instituto Nacional de Antropología e Historia, Ciudad de México, México
| | - Tábita Hünemeier
- Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo
| | | | | | - Macarena Fuentes
- Department of Genetics, Evolution and Environment, and UCL Genetics Institute, University College London, London, United Kingdom
- Departamento de Técnología Médica, Facultad de Ciencias de la Salud, Universidad de Tarapacá, Arica, Chile
| | - Carla Gallo
- Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Giovani Poletti
- Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Lavinia Schuler-Faccini
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
| | - Maria Cátira Bortolini
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
| | - Samuel Canizales-Quinteros
- Unidad de Genómica de Poblaciones Aplicada a la Salud, Facultad de Química, UNAM-Instituto Nacional de Medicina Genómica, Ciudad de México, México
| | | | | | - Javier Rosique
- Departamento de Antropología. Facultad de Ciencias Sociales y Humanas. Universidad de Antioquia, Medellín, Colombia
| | - Andrés Ruiz-Linares
- Department of Genetics, Evolution and Environment, and UCL Genetics Institute, University College London, London, United Kingdom
- MOE Key Laboratory of Contemporary Anthropology, Fudan University, Shanghai, China
- Aix Marseille Univ, CNRS, EFS, ADES, Marseille, France
| | - Rolando González-José
- Grupo de Investigación en Biología Evolutiva Humana, Instituto Patagónico de Ciencias Sociales y Humanas, Centro Nacional Patagónico, CONICET. Puerto Madryn, Chubut, Argentina
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Kirchengast S. Directional and fluctuating asymmetry among !Kung San and Kavango people of Northern Namibia: The impact of sex and subsistence patterns. Am J Hum Biol 2016; 29. [DOI: 10.1002/ajhb.22921] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 08/20/2016] [Indexed: 11/10/2022] Open
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22
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Kubicka AM, Lubiatowski P, Długosz JD, Romanowski L, Piontek J. Directional asymmetry of upper limbs in a medieval population from Poland: A combination of linear and geometric morphometrics. Am J Hum Biol 2016; 28:817-824. [PMID: 27238388 DOI: 10.1002/ajhb.22873] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2015] [Revised: 03/02/2016] [Accepted: 05/06/2016] [Indexed: 12/30/2022] Open
Abstract
OBJECTIVES Degrees of upper-limb bilateral asymmetry reflect habitual behavior and activity levels throughout life in human populations. The shoulder joint facilitates a wide range of combined motions due to the simultaneous motion of all three bones: clavicle, scapula, and humerus. Accordingly, we used three-dimensional geometric morphometrics to analyze shape differences in the glenoid cavity and linear morphometrics to obtain the degree of directional asymmetry in a medieval population. METHODS To calculate directional asymmetry, clavicles, humeri, and scapulae from 100 individuals (50 females, 50 males) were measured. Landmarks and semilandmarks were placed within a three-dimensional reconstruction of the glenoid cavity for analysis of shape differences between sides of the body within sexes. RESULTS Linear morphometrics showed significant directional asymmetry in both sexes in all bones. Geometric morphometrics revealed significant shape differences of the glenoid cavity between sides of the body in females but not in males. Both indicators of directional asymmetry (%DA and %AA) did not show significant differences between sexes. PLS analysis revealed a significant correlation between glenoid shape and two humeral head diameters only in females on the left side of the body. CONCLUSIONS The studied population, perhaps due to a high level of activity, exhibited slightly greater upper-limb bone bilateral asymmetry than other agricultural populations. Results suggest that the upper limbs were involved in similar activity patterns in both sexes but were characterized by different habitual behaviors. To obtain comprehensive results, studies should be based on sophisticated methods such as geometric morphometrics as well as standard measurements. Am. J. Hum. Biol. 28:817-824, 2016. © 2016Wiley Periodicals, Inc.
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Affiliation(s)
- Anna Maria Kubicka
- Department of Human Evolutionary Biology, Institute of Anthropology, Adam Mickiewicz University in Poznań, Poland
| | - Przemysław Lubiatowski
- Department of Traumatology, Orthopaedics and Hand Surgery, University of Medical Sciences in Poznań, Poland.,Rehasport Clinic, Poznań, Poland
| | | | - Leszek Romanowski
- Department of Traumatology, Orthopaedics and Hand Surgery, University of Medical Sciences in Poznań, Poland
| | - Janusz Piontek
- Department of Human Evolutionary Biology, Institute of Anthropology, Adam Mickiewicz University in Poznań, Poland
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De Luca S, Pacifici A, Pacifici L, Polimeni A, Fischetto SG, Velandia Palacio LA, Vanin S, Cameriere R. Third molar development by measurements of open apices in an Italian sample of living subjects. J Forensic Leg Med 2015; 38:36-42. [PMID: 26706411 DOI: 10.1016/j.jflm.2015.11.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 10/30/2015] [Accepted: 11/14/2015] [Indexed: 11/19/2022]
Abstract
The aim of this study is to analyse the age-predicting performance of third molar index (I3M) in dental age estimation. A multiple regression analysis was developed with chronological age as the independent variable. In order to investigate the relationship between the I3M and chronological age, the standard deviation and relative error were examined. Digitalized orthopantomographs (OPTs) of 975 Italian healthy subjects (531 female and 444 male), aged between 9 and 22 years, were studied. Third molar development was determined according to Cameriere et al. (2008). Analysis of covariance (ANCOVA) was applied to study the interaction between I3M and the gender. The difference between age and third molar index (I3M) was tested with Pearson's correlation coefficient. The I3M, the age and the gender of the subjects were used as predictive variable for age estimation. The small F-value for the gender (F = 0.042, p = 0.837) reveals that this factor does not affect the growth of the third molar. Adjusted R(2) (AdjR(2)) was used as parameter to define the best fitting function. All the regression models (linear, exponential, and polynomial) showed a similar AdjR(2). The polynomial (2nd order) fitting explains about the 78% of the total variance and do not add any relevant clinical information to the age estimation process from the third molar. The standard deviation and relative error increase with the age. The I3M has its minimum in the younger group of studied individuals and its maximum in the oldest ones, indicating that its precision and reliability decrease with the age.
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Affiliation(s)
- Stefano De Luca
- Departamento de Antropologia, Facultad de Ciencias Sociales y Jurídicas, Universidad de Tarapacá, Arica, Chile; AgEstimation Project, Institute of Legal Medicine, University of Macerata, Macerata, Italy.
| | - Andrea Pacifici
- AgEstimation Project, Institute of Legal Medicine, University of Macerata, Macerata, Italy; Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, Italy
| | - Luciano Pacifici
- AgEstimation Project, Institute of Legal Medicine, University of Macerata, Macerata, Italy; Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, Italy
| | - Antonella Polimeni
- Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, Italy
| | | | | | - Stefano Vanin
- School of Applied Science, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UK
| | - Roberto Cameriere
- AgEstimation Project, Institute of Legal Medicine, University of Macerata, Macerata, Italy
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24
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Waxenbaum EB, Sirak KA. Developmental patterns of bilateral asymmetry in ancestral puebloans. Am J Hum Biol 2015; 28:421-30. [DOI: 10.1002/ajhb.22804] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 09/01/2015] [Accepted: 10/25/2015] [Indexed: 11/12/2022] Open
Affiliation(s)
- Erin B. Waxenbaum
- Department of Anthropology; Northwestern University; Evanston Illinois 60208
| | - Kendra A. Sirak
- Department of Anthropology; Emory University; Atlanta Georgia 30322
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25
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Llopis-Belenguer C, Balbuena JA, Galván-Femenía I, Rodríguez-González A. Phenotypic Buffering in a Monogenean: Canalization and Developmental Stability in Shape and Size of the Haptoral Anchors of Ligophorus cephali (Monogenea: Dactylogyridae). PLoS One 2015; 10:e0142365. [PMID: 26544190 PMCID: PMC4636253 DOI: 10.1371/journal.pone.0142365] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 10/21/2015] [Indexed: 11/18/2022] Open
Abstract
Phenotypic variation results from the balance between sources of variation and counteracting regulatory mechanisms. Canalization and developmental stability are two such mechanisms, acting at two different levels of regulation. The issue of whether or not they act concurrently as a common developmental buffering capacity has been subject to debate. We used geometric morphometrics to quantify the mechanisms that guarantee phenotypic constancy in the haptoral anchors of Ligophorus cephali. Canalization and developmental stability were appraised by estimating inter- and intra-individual variation, respectively, in size and shape of dorsal and ventral anchors. The latter variation was estimated as fluctuating asymmetry (FA) between anchor pairs. The general-buffering-capacity hypothesis was tested by two different methods based on correlations and Principal Components Analyses of the different components of size and shape variation. Evidence for FA in the dorsal and ventral anchors in both shape and size was found. Our analyses supported the hypothesis of a general developmental buffering capacity. The evidence was more compelling for shape than for size and, particularly, for the ventral anchors than for the dorsal ones. These results are in line with previous studies of dactylogyrids suggesting that ventral anchors secure a firmer, more permanent attachment, whereas dorsal anchors are more mobile. Because fixation to the host is crucial for survival in ectoparasites, we suggest that homeostatic development of the ventral anchors has been promoted to ensure the morphological constancy required for efficient attachment. Geometric morphometrics can be readily applied to other host-monogenean models, affording not only to disentangle the effects of canalization and developmental stability, as shown herein, but to further partition the environmental and genetic components of the former.
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Affiliation(s)
- Cristina Llopis-Belenguer
- Marine Zoology Unit, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Valencia, Spain
- * E-mail:
| | - Juan Antonio Balbuena
- Marine Zoology Unit, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Valencia, Spain
| | - Iván Galván-Femenía
- Department of Computer Science, Applied Mathematics and Statistics, Universitat de Girona, Girona, Spain
| | - Abril Rodríguez-González
- Marine Zoology Unit, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Valencia, Spain
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Avila ML, Ward LC, Feldman BM, Montoya MI, Stinson J, Kiss A, Brandão LR. Normal values for segmental bioimpedance spectroscopy in pediatric patients. PLoS One 2015. [PMID: 25875618 DOI: 10.1371/hournal.pone.0126268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
INTRODUCTION Localized limb edema is a clinically relevant sign in diseases such as post-thrombotic syndrome and lymphedema. Quantitative evaluation of localized edema in children is mainly done by measuring the absolute difference in limb circumference, which includes fat and fat-free mass. Bioimpedance spectroscopy (BIS) provides information on the fluid volume of a body segment. Our objective was to determine normal ranges for segmental (arm and leg) BIS measurements in healthy children. Additionally, we determined the normal ranges for the difference in arm and ankle circumference and explored the influence of handedness and the correlation between techniques. METHODS Healthy children aged 1-18 years were recruited. The ratio of extracellular fluid content between contralateral limbs (estimated as the inter-arm and inter-leg extracellular impedance ratio), and the ratio of extracellular to intracellular fluid content for each limb (estimated as the intracellular to extracellular impedance ratio) were determined with a bioimpedance spectrometer. Arm and ankle circumference was determined with a Gulick II tape. RESULTS We recruited 223 healthy children (48 infants, 54 preschoolers, 66 school-aged children, and 55 teenagers). Normal values for arm and leg BIS measurements, and for the difference in arm and ankle circumference were estimated for each age category. No influence of handedness was found. We found a statistically significant correlation between extracellular impedance ratio and circumference difference for arms among teenagers. CONCLUSION We determined normal BIS ranges for arms and legs and for the difference in circumference between arms and between ankles in children. There was no statistically significant correlation between extracellular impedance ratio and difference in circumference, except in the case of arms in adolescents. This may indicate that limb circumference measures quantities other than fluid, challenging the adequacy of this technique to determine the presence of localized edema in most age groups.
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Affiliation(s)
- Maria Laura Avila
- Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Leigh C Ward
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, Brisbane, Australia
| | - Brian M Feldman
- Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada; Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada
| | - Madeline I Montoya
- Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Jennifer Stinson
- Child Health Evaluative Sciences, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada; Lawrence S. Bloomberg Faculty of Nursing, University of Toronto, Toronto, Ontario, Canada
| | - Alex Kiss
- Department of Research Design and Biostatistics, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Leonardo R Brandão
- Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
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Normal values for segmental bioimpedance spectroscopy in pediatric patients. PLoS One 2015; 10:e0126268. [PMID: 25875618 PMCID: PMC4395226 DOI: 10.1371/journal.pone.0126268] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 03/31/2015] [Indexed: 11/19/2022] Open
Abstract
Introduction Localized limb edema is a clinically relevant sign in diseases such as post-thrombotic syndrome and lymphedema. Quantitative evaluation of localized edema in children is mainly done by measuring the absolute difference in limb circumference, which includes fat and fat-free mass. Bioimpedance spectroscopy (BIS) provides information on the fluid volume of a body segment. Our objective was to determine normal ranges for segmental (arm and leg) BIS measurements in healthy children. Additionally, we determined the normal ranges for the difference in arm and ankle circumference and explored the influence of handedness and the correlation between techniques. Methods Healthy children aged 1-18 years were recruited. The ratio of extracellular fluid content between contralateral limbs (estimated as the inter-arm and inter-leg extracellular impedance ratio), and the ratio of extracellular to intracellular fluid content for each limb (estimated as the intracellular to extracellular impedance ratio) were determined with a bioimpedance spectrometer. Arm and ankle circumference was determined with a Gulick II tape. Results We recruited 223 healthy children (48 infants, 54 preschoolers, 66 school-aged children, and 55 teenagers). Normal values for arm and leg BIS measurements, and for the difference in arm and ankle circumference were estimated for each age category. No influence of handedness was found. We found a statistically significant correlation between extracellular impedance ratio and circumference difference for arms among teenagers. Conclusion We determined normal BIS ranges for arms and legs and for the difference in circumference between arms and between ankles in children. There was no statistically significant correlation between extracellular impedance ratio and difference in circumference, except in the case of arms in adolescents. This may indicate that limb circumference measures quantities other than fluid, challenging the adequacy of this technique to determine the presence of localized edema in most age groups.
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Schlager S, Rüdell A. Analysis of the human osseous nasal shape--population differences and sexual dimorphism. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2015; 157:571-81. [PMID: 25845882 DOI: 10.1002/ajpa.22749] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Accepted: 03/14/2015] [Indexed: 11/11/2022]
Abstract
OBJECTIVES In this study, the shape of the outer osseous nose in a German and a Chinese sample is analyzed using a dense set of semi-landmarks. Shape differences related to population and sex as well as directional and fluctuating asymmetry were statistically evaluated and also visualized. MATERIALS AND METHODS Shape differences in the bony nose were investigated between a large sample of CT scans of German (140 ♀, 127 ♂) and Chinese (135 ♀, 132 ♂) crania. We used semi-automatic methods to represent the shape of this region as a dense point-cloud, consisting of 370 three-dimensional bilateral coordinates. Both the symmetric and asymmetric modes of shape variation were addressed. RESULTS Strong differences in nasal shape were found between the two populations, while sex was found to play a minor role in explaining the observed shape variation. The expression of sexual dimorphism was similar in both populations. Differences attributed to population affinity and to sexual dimorphism were both found to affect the shape of the ossa nasalia and the projection of the spina nasalis. The correlation with population/sex was weak for directional asymmetry, but strong for fluctuating asymmetry. The nasal region is more asymmetric in Germans than in Chinese, with males displaying more asymmetry than females in both populations. DISCUSSION While the bony nose is well suited for predicting population affinity, regarding the populations under investigation, its value for sexing unknown individuals is rather moderate. The similar expression of sexual dimorphism in those otherwise very dissimilar populations indicates common factors responsible for these differences.
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Affiliation(s)
- Stefan Schlager
- Department of Anthropology, University of Freiburg, Baden-Württemberg, Germany
| | - Alexandra Rüdell
- Department of Anthropology, University of Freiburg, Baden-Württemberg, Germany
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29
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Gonzalez-Suarez CB, Dones VC, Grimmer K, Thoirs K, Milanese S, Atlas A. Radial nerve measurements in nonsymptomatic upper extremities of Filipinos: A cross-sectional study. Muscle Nerve 2015; 52:568-75. [PMID: 25597846 DOI: 10.1002/mus.24574] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 01/05/2015] [Accepted: 01/08/2015] [Indexed: 11/07/2022]
Abstract
INTRODUCTION Despite reports on the association of radial nerve (RN) size and lateral epicondylalgia (LE), Filipino normative values on RN size in healthy elbows are not established. An association with upper extremity anthropometric measurements is likewise not reported. METHODS Musculoskeletal ultrasound measurements of the RN at the level of the lateral epicondyle (RN-LE), posterior interosseous nerve at the level of the radial head and supinator (PIN-RH and PIN-sup), and superficial RN (SRN) in the elbows of healthy Filipinos were made in Manila from January-September 2011. RESULTS A total of 198 elbows of 99 healthy participants aged 43 years (range, 33-48 years) [median(IQR)] were investigated. Men have larger PIN-RH, PIN-sup, and SRN compared with women. Arm length was associated with PIN-RH, PIN-sup, and SRN (P < 0.05). Activities and elbow circumference measurements (at 2 levels) were associated with PIN-RH. CONCLUSIONS RN reference values can now be used for comparison in elbows with LE.
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Affiliation(s)
- Consuelo B Gonzalez-Suarez
- Center for Health Research and Movement Sciences, College of Rehabilitation Sciences, University of Santo Tomas, Philippines
| | - Valentin C Dones
- International Centre for Allied Health Evidence, School of Health Sciences, University of South Australia, Australia
| | - Karen Grimmer
- International Centre for Allied Health Evidence, School of Health Sciences, University of South Australia, Australia
| | - Kerry Thoirs
- International Centre for Allied Health Evidence, School of Health Sciences, University of South Australia, Australia
| | - Steven Milanese
- International Centre for Allied Health Evidence, School of Health Sciences, University of South Australia, Australia
| | - Alvin Atlas
- International Centre for Allied Health Evidence, School of Health Sciences, University of South Australia, Australia
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Quinto-Sánchez M, Adhikari K, Acuña-Alonzo V, Cintas C, Silva de Cerqueira CC, Ramallo V, Castillo L, Farrera A, Jaramillo C, Arias W, Fuentes M, Everardo P, de Avila F, Gomez-Valdés J, Hünemeier T, Gibbon S, Gallo C, Poletti G, Rosique J, Bortolini MC, Canizales-Quinteros S, Rothhammer F, Bedoya G, Ruiz-Linares A, González-José R. Facial asymmetry and genetic ancestry in Latin American admixed populations. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2015; 157:58-70. [DOI: 10.1002/ajpa.22688] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 12/03/2014] [Accepted: 12/11/2014] [Indexed: 11/08/2022]
Affiliation(s)
| | - Kaustubh Adhikari
- Department of Genetics; Evolution and Environment; and UCL Genetics Institute; University College London; London UK
| | - Victor Acuña-Alonzo
- Department of Genetics; Evolution and Environment; and UCL Genetics Institute; University College London; London UK
- Escuela Nacional de Antropología e Historia; Instituto Nacional de Antropología e Historia; Distrito Federal Mexico
| | - Celia Cintas
- Centro Nacional Patagónico, CONICET; Puerto Madryn Argentina
| | | | | | - Lucia Castillo
- Centro Nacional Patagónico, CONICET; Puerto Madryn Argentina
| | - Arodi Farrera
- Posgrado en Antropología; Facultad de Filosofía y Letras; UNAM; México City Mexico
| | - Claudia Jaramillo
- Departamento de Antropología; Facultad de Ciencias Humanas y Sociales; Universidad de Antioquia; Medellín Colombia
| | - Williams Arias
- Departamento de Antropología; Facultad de Ciencias Humanas y Sociales; Universidad de Antioquia; Medellín Colombia
| | - Macarena Fuentes
- Instituto de Alta Investigación Universidad de Tarapacá, Programa de Genética Humana ICBM Facultad de Medicina Universidad de Chile y Centro de Investigaciones del Hombre en el Desierto; Arica Chile
| | - Paola Everardo
- Escuela Nacional de Antropología e Historia; Instituto Nacional de Antropología e Historia; Distrito Federal Mexico
| | - Francisco de Avila
- Escuela Nacional de Antropología e Historia; Instituto Nacional de Antropología e Historia; Distrito Federal Mexico
| | | | - Tábita Hünemeier
- Departamento de Genética; Instituto de Biociências, Universidade Federal do Rio Grande do Sul; Porto Alegre Brasil
| | - Shara Gibbon
- Department of Anthropology; University College London; London UK
| | - Carla Gallo
- Laboratorios de Investigación y Desarrollo; Facultad de Ciencias y Filosofía; Universidad Peruana Cayetano Heredia; Lima Perú
| | - Giovanni Poletti
- Laboratorios de Investigación y Desarrollo; Facultad de Ciencias y Filosofía; Universidad Peruana Cayetano Heredia; Lima Perú
| | - Javier Rosique
- Departamento de Antropología; Facultad de Ciencias Humanas y Sociales; Universidad de Antioquia; Medellín Colombia
| | - Maria Cátira Bortolini
- Departamento de Genética; Instituto de Biociências, Universidade Federal do Rio Grande do Sul; Porto Alegre Brasil
| | - Samuel Canizales-Quinteros
- Unidad de Genómica de Poblaciones Aplicada a la Salud; Facultad de Química; UNAM-Instituto Nacional de Medicina Genómica
| | - Francisco Rothhammer
- Instituto de Alta Investigación Universidad de Tarapacá, Programa de Genética Humana ICBM Facultad de Medicina Universidad de Chile y Centro de Investigaciones del Hombre en el Desierto; Arica Chile
| | - Gabriel Bedoya
- Departamento de Antropología; Facultad de Ciencias Humanas y Sociales; Universidad de Antioquia; Medellín Colombia
| | - Andres Ruiz-Linares
- Department of Genetics; Evolution and Environment; and UCL Genetics Institute; University College London; London UK
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Tur S. Bilateral Asymmetry of Long Bones in Bronze and Early Iron Age Pastoralists of the Altai*. ARCHAEOLOGY, ETHNOLOGY AND ANTHROPOLOGY OF EURASIA 2014. [DOI: 10.1016/j.aeae.2015.04.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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32
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Gonzalez PN, Lotto FP, Hallgrímsson B. Canalization and developmental instability of the fetal skull in a mouse model of maternal nutritional stress. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2014; 154:544-53. [PMID: 24888714 PMCID: PMC4425270 DOI: 10.1002/ajpa.22545] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Revised: 05/18/2014] [Accepted: 05/20/2014] [Indexed: 11/08/2022]
Abstract
Nutritional imbalance is one of the main sources of stress in both extant and extinct human populations. Restricted availability of nutrients is thought to disrupt the buffering mechanisms that contribute to developmental stability and canalization, resulting in increased levels of fluctuating asymmetry (FA) and phenotypic variance among individuals. However, the literature is contradictory in this regard. This study assesses the effect of prenatal nutritional stress on FA and among-individual variance in cranial shape and size using a mouse model of maternal protein restriction. Two sets of landmark coordinates were digitized in three dimensions from skulls of control and protein restricted specimens at E17.5 and E18.5. We found that, by the end of gestation, maternal protein restriction resulted in a significant reduction of skull size. Fluctuating asymmetry in size and shape exceeded the amount of measurement error in all groups, but no significant differences in the magnitude of FA were found between treatments. Conversely, the pattern of shape asymmetry was affected by the environmental perturbation since the angles between the first eigenvectors extracted from the covariance matrix of shape asymmetric component of protein restricted and control groups were not significantly different from the expected for random vectors. In addition, among-individual variance in cranial shape was significantly higher in the protein restricted than the control group at E18.5. Overall, the results obtained from a controlled experiment do not support the view of fluctuating asymmetry of cranial structures as a reliable index for inferring nutritional stress in human populations.
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Affiliation(s)
- Paula N. Gonzalez
- CONICET, Instituto de Genética Veterinaria, Facultad de Ciencias Veterinarias, UNLP-CCT La Plata 1900, Argentina
- CONICET, División Antropología, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La Plata, Argentina
| | - Federico P. Lotto
- CONICET, División Antropología, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La Plata, Argentina
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Franks EM, Cabo LL. Quantifying asymmetry: Ratios and alternatives. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2014; 154:498-511. [DOI: 10.1002/ajpa.22539] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2013] [Accepted: 05/06/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Erin M. Franks
- Department of Biological Sciences; The University of Notre Dame; Notre Dame IN 46556
| | - Luis L. Cabo
- Department of Applied Forensic Sciences; Mercyhurst University; Erie PA 16546
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ten Broek CMA, Bots J, Varela-Lasheras I, Bugiani M, Galis F, Van Dongen S. Amniotic fluid deficiency and congenital abnormalities both influence fluctuating asymmetry in developing limbs of human deceased fetuses. PLoS One 2013; 8:e81824. [PMID: 24312362 PMCID: PMC3842303 DOI: 10.1371/journal.pone.0081824] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Accepted: 10/17/2013] [Indexed: 11/19/2022] Open
Abstract
Fluctuating asymmetry (FA), as an indirect measure of developmental instability (DI), has been intensively studied for associations with stress and fitness. Patterns, however, appear heterogeneous and the underlying causes remain largely unknown. One aspect that has received relatively little attention in the literature is the consequence of direct mechanical effects on asymmetries. The crucial prerequisite for FA to reflect DI is that environmental conditions on both sides should be identical. This condition may be violated during early human development if amniotic fluid volume is deficient, as the resulting mechanical pressures may increase asymmetries. Indeed, we showed that limb bones of deceased human fetuses exhibited increased asymmetry, when there was not sufficient amniotic fluid (and, thus, space) in the uterine cavity. As amniotic fluid deficiency is known to cause substantial asymmetries and abnormal limb development, these subtle asymmetries are probably at least in part caused by the mechanical pressures. On the other hand, deficiencies in amniotic fluid volume are known to be associated with other congenital abnormalities that may disturb DI. More specifically, urogenital abnormalities can directly affect/reduce amniotic fluid volume. We disentangled the direct mechanical effects on FA from the indirect effects of urogenital abnormalities, the latter presumably representing DI. We discovered that both factors contributed significantly to the increase in FA. However, the direct mechanical effect of uterine pressure, albeit statistically significant, appeared less important than the effects of urogenital abnormalities, with an effect size only two-third as large. We, thus, conclude that correcting for the relevant direct factors allowed for a representative test of the association between DI and stress, and confirmed that fetuses form a suitable model system to increase our understanding in patterns of FA and symmetry development.
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Affiliation(s)
- Clara Mariquita Antoinette ten Broek
- Group of Evolutionary Ecology, University of Antwerp, Antwerp, Belgium
- Department of Terrestrial Zoology, Naturalis Biodiversity Center, Leiden, The Netherlands
- * E-mail:
| | - Jessica Bots
- Group of Evolutionary Ecology, University of Antwerp, Antwerp, Belgium
| | - Irma Varela-Lasheras
- Department of Patterning and Morphogenesis, Gulbenkian Institute of Science, Oeiros, Portugal
| | - Marianna Bugiani
- Department of Pathology, VU Medical Centre, Amsterdam, The Netherlands
| | - Frietson Galis
- Department of Terrestrial Zoology, Naturalis Biodiversity Center, Leiden, The Netherlands
| | - Stefan Van Dongen
- Group of Evolutionary Ecology, University of Antwerp, Antwerp, Belgium
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Breno M, Bots J, Van Dongen S. Heritabilities of directional asymmetry in the fore- and hindlimbs of rabbit fetuses. PLoS One 2013; 8:e76358. [PMID: 24130770 PMCID: PMC3794934 DOI: 10.1371/journal.pone.0076358] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Accepted: 08/26/2013] [Indexed: 11/19/2022] Open
Abstract
Directional asymmetry (DA), where at the population level symmetry differs from zero, has been reported in a wide range of traits and taxa, even for traits in which symmetry is expected to be the target of selection such as limbs or wings. In invertebrates, DA has been suggested to be non-adaptive. In vertebrates, there has been a wealth of research linking morphological asymmetry to behavioural lateralisation. On the other hand, the prenatal expression of DA and evidences for quantitative genetic variation for asymmetry may suggest it is not solely induced by differences in mechanic loading between sides. We estimate quantitative genetic variation of fetal limb asymmetry in a large dataset of rabbits. Our results showed a low but highly significant level of DA that is partially under genetic control for all traits, with forelimbs displaying higher levels of asymmetry. Genetic correlations were positive within limbs, but negative across bones of fore and hind limbs. Environmental correlations were positive for all, but smaller across fore and hind limbs. We discuss our results in light of the existence and maintenance of DA in locomotory traits.
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Affiliation(s)
- Matteo Breno
- Evolutionary Biology Group, Department of Biology, University of Antwerp, Antwerp, Belgium
| | - Jessica Bots
- Evolutionary Biology Group, Department of Biology, University of Antwerp, Antwerp, Belgium
| | - Stefan Van Dongen
- Evolutionary Biology Group, Department of Biology, University of Antwerp, Antwerp, Belgium
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No significant difference in the levels of dental fluctuating asymmetry between hypoplastic and non-hypoplastic skeletal groups from the Joseon Dynasty (mid 15th–early 20th century), South Korea. Arch Oral Biol 2013; 58:1047-56. [DOI: 10.1016/j.archoralbio.2013.03.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2012] [Revised: 01/07/2013] [Accepted: 03/04/2013] [Indexed: 11/23/2022]
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Bigoni L, Krajíček V, Sládek V, Velemínský P, Velemínská J. Skull shape asymmetry and the socioeconomic structure of an early medieval central european society. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2013; 150:349-64. [DOI: 10.1002/ajpa.22210] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2012] [Accepted: 11/13/2012] [Indexed: 01/29/2023]
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Ubelaker DH, Zarenko KM. Can Handedness be Determined from Skeletal Remains? A Chronological Review of the Literature. J Forensic Sci 2012; 57:1421-6. [DOI: 10.1111/j.1556-4029.2012.02173.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Mura M, Castagna A, Fontani V, Rinaldi S. Preliminary pilot fMRI study of neuropostural optimization with a noninvasive asymmetric radioelectric brain stimulation protocol in functional dysmetria. Neuropsychiatr Dis Treat 2012; 8:149-54. [PMID: 22536071 PMCID: PMC3333783 DOI: 10.2147/ndt.s29971] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
PURPOSE This study assessed changes in functional dysmetria (FD) and in brain activation observable by functional magnetic resonance imaging (fMRI) during a leg flexion-extension motor task following brain stimulation with a single radioelectric asymmetric conveyer (REAC) pulse, according to the precisely defined neuropostural optimization (NPO) protocol. POPULATION AND METHODS Ten healthy volunteers were assessed using fMRI conducted during a simple motor task before and immediately after delivery of a single REAC-NPO pulse. The motor task consisted of a flexion-extension movement of the legs with the knees bent. FD signs and brain activation patterns were compared before and after REAC-NPO. RESULTS A single 250-millisecond REAC-NPO treatment alleviated FD, as evidenced by patellar asymmetry during a sit-up motion, and modulated activity patterns in the brain, particularly in the cerebellum, during the performance of the motor task. CONCLUSION Activity in brain areas involved in motor control and coordination, including the cerebellum, is altered by administration of a REAC-NPO treatment and this effect is accompanied by an alleviation of FD.
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Affiliation(s)
- Marco Mura
- Institute of Radiology, University of Cagliari, Florence, Italy
| | - Alessandro Castagna
- Rinaldi Fontani Institute – Department of Neuro Psycho Physical Optimization, Florence, Italy
| | - Vania Fontani
- Rinaldi Fontani Institute – Department of Neuro Psycho Physical Optimization, Florence, Italy
| | - Salvatore Rinaldi
- Rinaldi Fontani Institute – Department of Neuro Psycho Physical Optimization, Florence, Italy
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40
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Ozener B. Extreme behavioral lateralization and the remodeling of the distal humerus. Am J Hum Biol 2012; 24:436-40. [DOI: 10.1002/ajhb.22240] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2011] [Revised: 12/21/2011] [Accepted: 12/22/2011] [Indexed: 11/10/2022] Open
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41
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Watkins CD, Jones BC, Little AC, DeBruine LM, Feinberg DR. Cues to the sex ratio of the local population influence women’s preferences for facial symmetry. Anim Behav 2012. [DOI: 10.1016/j.anbehav.2011.12.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Krishan K. Marked limb bilateral asymmetry in an agricultural endogamous population of North India. Am J Hum Biol 2011; 23:674-85. [DOI: 10.1002/ajhb.21196] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 03/15/2011] [Accepted: 04/22/2011] [Indexed: 12/17/2022] Open
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