Craniometric variation among Brazilian and Scottish populations

A physical anthropology approach

Thais Torralbo Lopez-Capp, Christopher Rynn, Caroline Wilkinson, Luiz Airton Saavedra de Paiva, Edgard Michel-Crosato, Maria Gabriela Haye Biazevic

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Abstract

Aim: The present investigation intended to compare the craniometric variations of two samples of different nationalities (Brazilian and Scottish). Materials and methods: The Brazilian sample consisted of 100 modern complete skulls, including 53 female skulls and 47 male skulls, and the Scottish sample consisted of 100 historical skulls (61 males, 39 females) and 36 mandibles (24 males, 12 females). The cranial measurement protocol was composed of 40 measurements, 11 bilateral and 29 unilateral, and the measurement protocol of the mandible was composed of 15 measurements, with six that were bilateral and nine that were unique. The comparative analysis of the metric variability between the two samples was performed using the means and medians analysis, the t-test, the Wilcoxon test, and the coefficient of variance, with a significance level of 5%. Results: The results showed that, among the 72 analysed variables, 44 measurements (61.11%) presented statistical differences between the samples. The Scottish skull tends to have a cranial length (GOL diff=5.53), breadth (XCB diff=3.78) and height (NPH diff=5.33) greater than the Brazilian skulls, and the Scottish mandibles tend to show a higher mandibular ramus height (MRH diff=9.25), a higher mandibular body height (HMB diff=6.37) and a larger bigonial breadth (BGB diff=5.29) than the Brazilians. The discriminant analysis of the 51 cranial measurements and 21 mandibular measurements showed a variation of the percentage of accuracy between 46.3- 83.8%. Conclusion: The metric analysis demonstrated that there is variability between the two samples studied (61.11%), but a concrete cause cannot be determined considering the multifactorial aspects of the variations of form and size.

Original languageEnglish
Article numbere18019
Number of pages17
JournalBrazilian Journal of Oral Sciences
Volume17
DOIs
Publication statusPublished - 2018

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Physical Anthropology
Skull
Mandible
Population
Body Height
Discriminant Analysis
Ethnic Groups

Keywords

  • Craniometry
  • Forensic anthropology
  • Forensic dentistry
  • Forensic sciences
  • Skull

Cite this

Lopez-Capp, Thais Torralbo ; Rynn, Christopher ; Wilkinson, Caroline ; de Paiva, Luiz Airton Saavedra ; Michel-Crosato, Edgard ; Biazevic, Maria Gabriela Haye. / Craniometric variation among Brazilian and Scottish populations : A physical anthropology approach. In: Brazilian Journal of Oral Sciences. 2018 ; Vol. 17.
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abstract = "Aim: The present investigation intended to compare the craniometric variations of two samples of different nationalities (Brazilian and Scottish). Materials and methods: The Brazilian sample consisted of 100 modern complete skulls, including 53 female skulls and 47 male skulls, and the Scottish sample consisted of 100 historical skulls (61 males, 39 females) and 36 mandibles (24 males, 12 females). The cranial measurement protocol was composed of 40 measurements, 11 bilateral and 29 unilateral, and the measurement protocol of the mandible was composed of 15 measurements, with six that were bilateral and nine that were unique. The comparative analysis of the metric variability between the two samples was performed using the means and medians analysis, the t-test, the Wilcoxon test, and the coefficient of variance, with a significance level of 5{\%}. Results: The results showed that, among the 72 analysed variables, 44 measurements (61.11{\%}) presented statistical differences between the samples. The Scottish skull tends to have a cranial length (GOL diff=5.53), breadth (XCB diff=3.78) and height (NPH diff=5.33) greater than the Brazilian skulls, and the Scottish mandibles tend to show a higher mandibular ramus height (MRH diff=9.25), a higher mandibular body height (HMB diff=6.37) and a larger bigonial breadth (BGB diff=5.29) than the Brazilians. The discriminant analysis of the 51 cranial measurements and 21 mandibular measurements showed a variation of the percentage of accuracy between 46.3- 83.8{\%}. Conclusion: The metric analysis demonstrated that there is variability between the two samples studied (61.11{\%}), but a concrete cause cannot be determined considering the multifactorial aspects of the variations of form and size.",
keywords = "Craniometry, Forensic anthropology, Forensic dentistry, Forensic sciences, Skull",
author = "Lopez-Capp, {Thais Torralbo} and Christopher Rynn and Caroline Wilkinson and {de Paiva}, {Luiz Airton Saavedra} and Edgard Michel-Crosato and Biazevic, {Maria Gabriela Haye}",
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Craniometric variation among Brazilian and Scottish populations : A physical anthropology approach. / Lopez-Capp, Thais Torralbo; Rynn, Christopher; Wilkinson, Caroline; de Paiva, Luiz Airton Saavedra; Michel-Crosato, Edgard; Biazevic, Maria Gabriela Haye.

In: Brazilian Journal of Oral Sciences, Vol. 17, e18019, 2018.

Research output: Contribution to journalArticle

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