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Olsen TB, García-Martínez D, Villa C. Testing different 3D techniques using geometric morphometrics: Implications for cranial fluctuating asymmetry in humans. AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY 2023; 180:224-234. [PMID: 36790697 PMCID: PMC10100329 DOI: 10.1002/ajpa.24657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 10/05/2022] [Accepted: 11/01/2022] [Indexed: 11/17/2022]
Abstract
This study aimed to test the performance of 3D digitizer, CT scanner, and surface scanner in detecting cranial fluctuating asymmetry. Sets of 32 landmarks (6 in the midline and 13 bilateral) were acquired from 14 archeological crania using a 3D digitizer, and from 3D models generated from a CT scanner and surface scanner using Viewbox 4. Levels of shape variation were analyzed in MorphoJ using Procrustes analysis of variance and Principal component analysis. Intra-observer error accounted for 1.7%, 1.8%, and 4.5% of total shape variation for 3D digitizer, CT scanner, and surface scanner respectively. Fluctuating asymmetry accounted for 15%-16% of total shape variation. Variation between techniques accounted for 18% of total shape variation. We found a higher level of missing landmarks in our surface scan data than for both 3D digitizer and CT scanner data, and both 3D model-based techniques sometimes obscured taphonomic damage. All three 3D techniques are appropriate for measuring cranial fluctuating asymmetry. We advise against combining data collected with different techniques.
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Affiliation(s)
- Trine Bottos Olsen
- Laboratory of Advanced Imaging and 3D modelling, Section of Forensic Pathology, Department of Forensic Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Daniel García-Martínez
- Physical Anthropology Unit, Department of Biodiversity, Ecology, and Evolution, Faculty of Biological Sciences, Complutense University of Madrid, Madrid, Spain.,Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Burgos, Spain.,Laboratory of Forensic Anthropology, Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - Chiara Villa
- Laboratory of Advanced Imaging and 3D modelling, Section of Forensic Pathology, Department of Forensic Medicine, University of Copenhagen, Copenhagen, Denmark
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Villamil CI, Santiago-Nazario A. Integration between the cranial boundaries of the nasopharynx and the upper cervical vertebrae in Homo and Pan. Anat Rec (Hoboken) 2021; 305:1974-1990. [PMID: 34510776 DOI: 10.1002/ar.24750] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 07/13/2021] [Accepted: 07/27/2021] [Indexed: 01/17/2023]
Abstract
The nasopharynx is an important anatomical structure involved in respiration. Its bony boundaries, including the basicranium and upper cervical vertebrae, may be subject to selective pressures and constraints related to respiratory function. Here, we investigate phenotypic integration, or covariation, between the face, the basicranial boundaries of the nasopharynx, and the atlas and axis to understand constraints affecting these structures. We collected three-dimensional coordinate data from a sample of 80 humans and 44 chimpanzees, and used two-block partial least squares to assess RV (a multivariate generalization of Pearson's r2 ), rPLS , the covariance ratio, and effect size for integration among structures. We find that integration is significant among some of these structures, and that integration between the basicranial nasopharynx and vertebrae and between the face and vertebrae is likely independent. We also find divergences in the pattern of integration between humans and chimpanzees suggesting greater constraints among the human face and nasopharynx, which we suggest are linked to divergent developmental trajectories in the two taxa. Evolutionary changes in human basicranial anatomy, coupled with human-like developmental trajectories, may have required that the face grow to compensate any variation in nasopharyngeal structure. However, we were unable to determine whether the nasopharynx or the face is more strongly integrated with the vertebrae, and therefore whether respiration or biomechanical considerations related to positional behavior may be more strongly tied to vertebral evolution. Future work should focus on greater sample sizes, soft tissue structures, and more diverse taxa to further clarify these findings.
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Keidan L, Barash A, Lenzner Z, Pick CG, Been E. Sexual dimorphism of the posterior cervical spine muscle attachments. J Anat 2021; 239:589-601. [PMID: 33876427 PMCID: PMC8349410 DOI: 10.1111/joa.13448] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 02/24/2021] [Accepted: 04/01/2021] [Indexed: 01/14/2023] Open
Abstract
Cervical spinal injury and neck pain are common disorders with wide physical implications. Neck pain and disability are reported to occur in females more often than in males, and chronic or persistent neck pain after whiplash is twice as common in females. Female athletes also sustain a higher percentage of concussions compared to male athletes. Still, while sexual differences in clinical presentation and outcome are well-established, the underlying etiology for the disparity remains less clear. It is well-established that the origin and insertion landmarks of posterior neck muscles are highly variable, but we do not know if these interindividual differences are associated with sex. Expanding our knowledge on sexual dimorphism in the anatomy of the cervical muscles is essential to our understanding of the possible biomechanical differences between the sexes and hence improves our understanding as to why females suffer from cervical pain more than males. It is also of paramount importance for accurate planning of posterior cervical spine surgery, which cuts through the posterior cervical musculature. Therefore, our main objective is to characterize the anatomy of posterior neck musculature and to explore possible sexual differences in the location of their attachment points. Meticulous posterior neck dissection was performed on 35 cadavers, 19 females, and 16 males. In each specimen, 8 muscle groups were examined bilaterally at 45 osseous anatomical landmarks. Muscles and their attachment sites were evaluated manually then photographed and recorded using Microscribe Digitizer technology built into 3D models. A comparison of attachment landmarks between males and females for each muscle was conducted. Out of the eight muscles that were measured, only two muscles demonstrated significant sex-related anatomical differences-Spinotranversales (splenius capitis and cervicis) and Multifidus. Male Spinotransversales muscle has more attachment points than female. It showed more cranial insertion points in the upper cervical attachments (superior nuchal line, C1 posterior tubercle, and mastoid process) and more caudal insertion points in the spinous processes and transverse processes of the lower cervical and upper thoracic vertebrae. Thus, the male subjects in this study exhibited a greater coverage of the posterior neck both cranially and caudally. Female Multifidus has more attachment points on the spinous processes and articular processes at middle and lower cervical vertebrae and at the transverse processes of the upper thoracic vertebrae. All remaining muscles exhibited no sexual differences. Our findings highlight, for the first time, a sexual dimorphism in attachment points of posterior cervical musculature. It reinforces the notion that the female neck is not a scaled version of the male neck. These differences in muscle attachment could partially explain differences in muscle torque production and range of motion and thus biomechanical differences in cervical spine stabilization between sexes. It sheds a much-needed light on the reason for higher whiplash rates, concussion, and chronic cervical pain among females. Surgeons should take these sexual morphological differences into consideration when deliberating the best surgical approach for posterior cervical surgery.
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Affiliation(s)
- Lee Keidan
- Department of Anatomy and AnthropologySackler Faculty of MedicineTel‐Aviv UniversityTel‐AvivIsrael
| | - Alon Barash
- Azrieli Faculty of MedicineBar Ilan UniversitySafedIsrael
| | - Ziv Lenzner
- Screen Based Art DepartmentBezalel Academy of Arts and DesignJerusalemIsrael
| | - Chaim G. Pick
- Department of Anatomy and AnthropologySackler Faculty of MedicineTel‐Aviv UniversityTel‐AvivIsrael
- Sagol School of NeuroscienceTel Aviv UniversityTel AvivIsrael
- The Dr. Miriam and Sheldon G. Adelson Chair and Center for the Biology of Addictive DiseasesTel‐Aviv UniversityTel‐AvivIsrael
- Sylvan Adams Sports InstituteTel Aviv UniversityTel AvivIsrael
| | - Ella Been
- Department of Anatomy and AnthropologySackler Faculty of MedicineTel‐Aviv UniversityTel‐AvivIsrael
- Department of Sports TherapyFaculty of Health ProfessionsOno Academic CollegeKiryat OnoIsrael
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Ross AH, Williams SE. Ancestry Studies in Forensic Anthropology: Back on the Frontier of Racism. BIOLOGY 2021; 10:biology10070602. [PMID: 34209891 PMCID: PMC8301154 DOI: 10.3390/biology10070602] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/25/2021] [Accepted: 06/28/2021] [Indexed: 11/16/2022]
Abstract
One of the parameters forensic anthropologists have traditionally estimated is ancestry, which is used in the United States as a proxy for social race. Its use is controversial because the biological race concept was debunked by scientists decades ago. However, many forensic anthropologists contend, in part, that because social race categories used by law enforcement can be predicted by cranial variation, ancestry remains a necessary parameter for estimation. Here, we use content analysis of the Journal of Forensic Sciences for the period 2009-2019 to demonstrate the use of various nomenclature and resultant confusion in ancestry estimation studies, and as a mechanism to discuss how forensic anthropologists have eschewed a human variation approach to studying human morphological differences in favor of a simplistic and debunked typological one. Further, we employ modern geometric morphometric and spatial analysis methods on craniofacial coordinate anatomical landmarks from several Latin American samples to test the validity of applying the antiquated tri-continental approach to ancestry (i.e., African, Asian, European). Our results indicate groups are not patterned by the ancestry trifecta. These findings illustrate the benefit and necessity of embracing studies that employ population structure models to better understand human variation and the historical factors that have influenced it.
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Affiliation(s)
- Ann H. Ross
- Human Identification & Forensic Analysis Laboratory, Department of Biological Sciences, North Carolina State University, Raleigh, NC 276995, USA
- Correspondence:
| | - Shanna E. Williams
- Department of Biomedical Sciences, UofSC School of Medicine Greenville, Greenville, SC 29605, USA;
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Waltenberger L, Rebay-Salisbury K, Mitteroecker P. Three-dimensional surface scanning methods in osteology: A topographical and geometric morphometric comparison. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2021; 174:846-858. [PMID: 33410519 PMCID: PMC8048833 DOI: 10.1002/ajpa.24204] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 11/11/2020] [Accepted: 12/08/2020] [Indexed: 11/21/2022]
Abstract
Objectives Three‐dimensional (3D) data collected by structured light scanners, photogrammetry, and computed tomography (CT) scans are increasingly combined in joint analyses, even though the scanning techniques and reconstruction software differ considerably. The aim of the present study was to compare the quality and accuracy of surface models and landmark data obtained from modern clinical CT scanning, 3D structured light scanner, photogrammetry, and MicroScribe digitizer. Material and methods We tested 13 different photogrammetric software tools and compared surface models obtained by different methods for four articulated human pelves in a topographical analysis. We also measured a set of 219 landmarks and semilandmarks twice on every surface as well as directly on the dry bones with a MicroScribe digitizer. Results Only one photogrammetric software package yielded surface models of the complete pelves that could be used for further analysis. Despite the complex pelvic anatomy, all three methods (CT scanning, 3D structured light scanning, photogrammetry) yielded similar surface representations with average deviations among the surface models between 100 and 200 μm. A geometric morphometric analysis of the measured landmarks showed that the different scanning methods yielded similar shape variables, but data acquisition via MicroScribe digitizer was most prone to error. Discussion We demonstrated that three‐dimensional models obtained by different methods can be combined in a single analysis. Photogrammetry proved to be a cheap, quick, and accurate method to generate 3D surface models at useful resolutions, but photogrammetry software packages differ enormously in quality.
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Affiliation(s)
- Lukas Waltenberger
- Austrian Archaeological Institute, Austrian Academy of Sciences, Vienna, Austria.,Department of Evolutionary Biology, University of Vienna, Vienna, Austria
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Shaw SM, Martino R, Mahdi A, Sawyer FK, Mathur S, Hope A, Agur AM. Architecture of the Suprahyoid Muscles: A Volumetric Musculoaponeurotic Analysis. JOURNAL OF SPEECH, LANGUAGE, AND HEARING RESEARCH : JSLHR 2017; 60:2808-2818. [PMID: 28973130 DOI: 10.1044/2017_jslhr-s-16-0277] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Accepted: 05/13/2017] [Indexed: 05/28/2023]
Abstract
PURPOSE Suprahyoid muscles play a critical role in swallowing. The arrangement of the fiber bundles and aponeuroses has not been investigated volumetrically, even though muscle architecture is an important determinant of function. Thus, the purpose was to digitize, model in three dimensions, and quantify the architectural parameters of the suprahyoid muscles to determine and compare their relative functional capabilities. METHOD Fiber bundles and aponeuroses from 11 formalin-embalmed specimens were serially dissected and digitized in situ. Data were reconstructed in three dimensions using Autodesk Maya. Architectural parameters were quantified, and data were compared using independent samples t-tests and analyses of variance. RESULTS Based on architecture and attachment sites, suprahyoid muscles were divided into 3 groups: anteromedial, superolateral, and superoposterior. Architectural parameters differed significantly (p < .05) across muscles and across the 3 groups, suggesting differential roles in hyoid movement during swallowing. When activated simultaneously, anteromedial and superoposterior muscle groups could work together to elevate the hyoid. CONCLUSIONS The results suggest that the suprahyoid muscles can have individualized roles in hyoid excursion during swallowing. Muscle balance may be important for identifying and treating hyolaryngeal dysfunction in patients with dysphagia.
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Affiliation(s)
- Stephanie M Shaw
- Department of Speech-Language Pathology, University of Toronto, Ontario, Canada
| | - Rosemary Martino
- Department of Speech-Language Pathology, University of Toronto, Ontario, Canada
- Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Ontario, Canada
- Health Care and Outcomes Research, Toronto Western Research Institute, University Health Network, Ontario, Canada
| | - Ali Mahdi
- Department of Surgery, Division of Anatomy, University of Toronto, Ontario, Canada
| | - Forrest Kip Sawyer
- Department of Surgery, Division of Anatomy, University of Toronto, Ontario, Canada
| | - Sunita Mathur
- Department of Physical Therapy, University of Toronto, Ontario, Canada
| | - Andrew Hope
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Anne M Agur
- Department of Surgery, Division of Anatomy, University of Toronto, Ontario, Canada
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OHNO KENGO, KAWAKUBO YOSHINORI, KURAOKA AKIO. Re-evaluation of temporal changes in alveolar protrusion in Japan according to two newly introduced craniometric angles. ANTHROPOL SCI 2016. [DOI: 10.1537/ase.160103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- KENGO OHNO
- Department of Anatomy and Biological Anthropology, Faculty of Medicine, Saga University, Saga
| | - YOSHINORI KAWAKUBO
- Department of Anatomy and Biological Anthropology, Faculty of Medicine, Saga University, Saga
| | - AKIO KURAOKA
- Department of Anatomy and Biological Anthropology, Faculty of Medicine, Saga University, Saga
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