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Three-dimensional geometric morphometric sex determination of the whole and modeled fragmentary human pubic bone

Sex determination of the human pelvis has traditionally been done through visual analyses of morphoscopic traits and there are limited metric methods available to forensic anthropologists to add metric credibility to these analyses. The goal of this research was to create an improved metric method u...

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Autores principales: Baca, Katherine, Bridge, Brandon, Snow, Meradeth
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8985971/
https://www.ncbi.nlm.nih.gov/pubmed/35385554
http://dx.doi.org/10.1371/journal.pone.0265754
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author Baca, Katherine
Bridge, Brandon
Snow, Meradeth
author_facet Baca, Katherine
Bridge, Brandon
Snow, Meradeth
author_sort Baca, Katherine
collection PubMed
description Sex determination of the human pelvis has traditionally been done through visual analyses of morphoscopic traits and there are limited metric methods available to forensic anthropologists to add metric credibility to these analyses. The goal of this research was to create an improved metric method using three-dimensional geometric morphometrics to determine sex from both whole and modeled fragmented human pubic bones. The sample consisted of n = 378 pubic bones from the University of New Mexico’s Maxwell Museum Documented Skeletal Collection and eight landmarks were collected from each bone. Statistical analyses and machine learning algorithms were used to predict the accuracy of the method’s ability to classify a bone as male or female on both whole and simulated fragmented remains; this included tests run on each possible landmark combination of three or more landmarks to simulate fragmented bones (218 combinations). The results of the whole bone analysis resulted in 95.35% testing accuracy. The results of the modeled fragmentary analysis consisted of 164 combinations which exhibit a 90% or higher accuracy in sex prediction; and twelve combinations which exhibit 96% or higher accuracy in sex prediction. In particular, two landmarks clustered around the ventral arc of the pubic bone performed the best, indicating this is the most sexually dimorphic portion of the bone. These results indicate that three-dimensional geometric morphometrics is a valid method to be applied to sex determination in forensic anthropology.
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spelling pubmed-89859712022-04-07 Three-dimensional geometric morphometric sex determination of the whole and modeled fragmentary human pubic bone Baca, Katherine Bridge, Brandon Snow, Meradeth PLoS One Research Article Sex determination of the human pelvis has traditionally been done through visual analyses of morphoscopic traits and there are limited metric methods available to forensic anthropologists to add metric credibility to these analyses. The goal of this research was to create an improved metric method using three-dimensional geometric morphometrics to determine sex from both whole and modeled fragmented human pubic bones. The sample consisted of n = 378 pubic bones from the University of New Mexico’s Maxwell Museum Documented Skeletal Collection and eight landmarks were collected from each bone. Statistical analyses and machine learning algorithms were used to predict the accuracy of the method’s ability to classify a bone as male or female on both whole and simulated fragmented remains; this included tests run on each possible landmark combination of three or more landmarks to simulate fragmented bones (218 combinations). The results of the whole bone analysis resulted in 95.35% testing accuracy. The results of the modeled fragmentary analysis consisted of 164 combinations which exhibit a 90% or higher accuracy in sex prediction; and twelve combinations which exhibit 96% or higher accuracy in sex prediction. In particular, two landmarks clustered around the ventral arc of the pubic bone performed the best, indicating this is the most sexually dimorphic portion of the bone. These results indicate that three-dimensional geometric morphometrics is a valid method to be applied to sex determination in forensic anthropology. Public Library of Science 2022-04-06 /pmc/articles/PMC8985971/ /pubmed/35385554 http://dx.doi.org/10.1371/journal.pone.0265754 Text en © 2022 Baca et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Baca, Katherine
Bridge, Brandon
Snow, Meradeth
Three-dimensional geometric morphometric sex determination of the whole and modeled fragmentary human pubic bone
title Three-dimensional geometric morphometric sex determination of the whole and modeled fragmentary human pubic bone
title_full Three-dimensional geometric morphometric sex determination of the whole and modeled fragmentary human pubic bone
title_fullStr Three-dimensional geometric morphometric sex determination of the whole and modeled fragmentary human pubic bone
title_full_unstemmed Three-dimensional geometric morphometric sex determination of the whole and modeled fragmentary human pubic bone
title_short Three-dimensional geometric morphometric sex determination of the whole and modeled fragmentary human pubic bone
title_sort three-dimensional geometric morphometric sex determination of the whole and modeled fragmentary human pubic bone
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8985971/
https://www.ncbi.nlm.nih.gov/pubmed/35385554
http://dx.doi.org/10.1371/journal.pone.0265754
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