Complex pattern of variation in neurocranial ontogeny revealed by CT-scanning
The neurocranium of hominid species has been largely studied with reference to the midsagittal plane, with variations being attributed to brain evolution. By contrast, there is limited information on variation in non-midsagittal regions, which are the points of insertion of muscles and bony structur...
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2018
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00035548_v75_n2_p89_Anzelmo http://hdl.handle.net/20.500.12110/paper_00035548_v75_n2_p89_Anzelmo |
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paper:paper_00035548_v75_n2_p89_Anzelmo2023-06-08T14:24:35Z Complex pattern of variation in neurocranial ontogeny revealed by CT-scanning Development Functional matrices Growth Modern human Modularity adolescent adult anatomy and histology animal brain cephalometry child diagnostic imaging female growth, development and aging human infant male physical anthropology preschool child procedures skull x-ray computed tomography young adult Adolescent Adult Animals Anthropology, Physical Brain Cephalometry Child Child, Preschool Female Humans Infant Male Skull Tomography, X-Ray Computed Young Adult The neurocranium of hominid species has been largely studied with reference to the midsagittal plane, with variations being attributed to brain evolution. By contrast, there is limited information on variation in non-midsagittal regions, which are the points of insertion of muscles and bony structures related to mastication. This work aims to analyze ontogenetic changes and sexual dimorphism (SD) in midsagittal and non-midsagittal neurocranial structures from a contemporary human sample comprising 138 computed tomography (CT) cranial images of individuals ranging from infants to adults. Morphology of the vault and the base was assessed by registering landmarks and semilandmarks, which were analyzed by geometric morphometrics, and the endocranial volume (EV). The results of regressions and Kruskal-Wallis test indicate that the major size and shape changes in both midsagittal and non-midsagittal regions occur during infancy and juvenility; shape changes are also associated with an increase in EV. The size of the midsagittal vault, the shape of the non-midsagittal vault and the size of the base show an extension of ontogenetic trajectories. Sexes show similar changes in shape but different changes in size. We conclude that brain growth appears to be an important factor influencing the morphology of the neurocranium, at least during infancy and childhood. Subsequent changes may be attributed to osteogenic activity and the differential growth of the brain lobes. Masticatory-related bony structures and muscles may not be strong enough factors to induce independent modifications in non-midsagittal structures. The small influence of the cranial muscles would explain why the human neurocranium is a quite integrated structure. © 2018 E. Schweizerbart’sche Verlagsbuchhandlung, 70176 Stuttgart, Germany. 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00035548_v75_n2_p89_Anzelmo http://hdl.handle.net/20.500.12110/paper_00035548_v75_n2_p89_Anzelmo |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Development Functional matrices Growth Modern human Modularity adolescent adult anatomy and histology animal brain cephalometry child diagnostic imaging female growth, development and aging human infant male physical anthropology preschool child procedures skull x-ray computed tomography young adult Adolescent Adult Animals Anthropology, Physical Brain Cephalometry Child Child, Preschool Female Humans Infant Male Skull Tomography, X-Ray Computed Young Adult |
| spellingShingle |
Development Functional matrices Growth Modern human Modularity adolescent adult anatomy and histology animal brain cephalometry child diagnostic imaging female growth, development and aging human infant male physical anthropology preschool child procedures skull x-ray computed tomography young adult Adolescent Adult Animals Anthropology, Physical Brain Cephalometry Child Child, Preschool Female Humans Infant Male Skull Tomography, X-Ray Computed Young Adult Complex pattern of variation in neurocranial ontogeny revealed by CT-scanning |
| topic_facet |
Development Functional matrices Growth Modern human Modularity adolescent adult anatomy and histology animal brain cephalometry child diagnostic imaging female growth, development and aging human infant male physical anthropology preschool child procedures skull x-ray computed tomography young adult Adolescent Adult Animals Anthropology, Physical Brain Cephalometry Child Child, Preschool Female Humans Infant Male Skull Tomography, X-Ray Computed Young Adult |
| description |
The neurocranium of hominid species has been largely studied with reference to the midsagittal plane, with variations being attributed to brain evolution. By contrast, there is limited information on variation in non-midsagittal regions, which are the points of insertion of muscles and bony structures related to mastication. This work aims to analyze ontogenetic changes and sexual dimorphism (SD) in midsagittal and non-midsagittal neurocranial structures from a contemporary human sample comprising 138 computed tomography (CT) cranial images of individuals ranging from infants to adults. Morphology of the vault and the base was assessed by registering landmarks and semilandmarks, which were analyzed by geometric morphometrics, and the endocranial volume (EV). The results of regressions and Kruskal-Wallis test indicate that the major size and shape changes in both midsagittal and non-midsagittal regions occur during infancy and juvenility; shape changes are also associated with an increase in EV. The size of the midsagittal vault, the shape of the non-midsagittal vault and the size of the base show an extension of ontogenetic trajectories. Sexes show similar changes in shape but different changes in size. We conclude that brain growth appears to be an important factor influencing the morphology of the neurocranium, at least during infancy and childhood. Subsequent changes may be attributed to osteogenic activity and the differential growth of the brain lobes. Masticatory-related bony structures and muscles may not be strong enough factors to induce independent modifications in non-midsagittal structures. The small influence of the cranial muscles would explain why the human neurocranium is a quite integrated structure. © 2018 E. Schweizerbart’sche Verlagsbuchhandlung, 70176 Stuttgart, Germany. |
| title |
Complex pattern of variation in neurocranial ontogeny revealed by CT-scanning |
| title_short |
Complex pattern of variation in neurocranial ontogeny revealed by CT-scanning |
| title_full |
Complex pattern of variation in neurocranial ontogeny revealed by CT-scanning |
| title_fullStr |
Complex pattern of variation in neurocranial ontogeny revealed by CT-scanning |
| title_full_unstemmed |
Complex pattern of variation in neurocranial ontogeny revealed by CT-scanning |
| title_sort |
complex pattern of variation in neurocranial ontogeny revealed by ct-scanning |
| publishDate |
2018 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00035548_v75_n2_p89_Anzelmo http://hdl.handle.net/20.500.12110/paper_00035548_v75_n2_p89_Anzelmo |
| _version_ |
1768544344084578304 |