Matrices funcionales e integración morfológica. Un estudio ontogénico de la bóveda y el maxilar/Functional matrices and morphological integration. An ontogenetic study on the vault and the maxilla

Autores/as

  • Jimena Barbeito-Andrés Universidad Nacional de La Plata. Argentina
  • Marina L. Sardi
  • Marisol Anzelmo
  • Héctor M. Pucciarelli

Resumen

RESUMEN Los estudios ontogénicos permiten conocer cómo se generan las diferencias morfológicas que encontramos en adultos. Éstas resultan de la asociación diferencial entre rasgos morfológicos, lo que puede deberse tanto a factores del desarrollo como funcionales. De acuerdo a la hipótesis funcional, los cambios en las estructuras óseas son consecuencia de la influencia de tejidos blandos, cavidades y órganos (matriz funcional). En este trabajo se analizaron dos estructuras craneofaciales: la bóveda, formada por varios huesos y una matriz funcional homogénea y el maxilar, un hueso único afectado por diversas matrices, para poner a prueba la hipótesis que postula que durante la ontogenia cambian los patrones de covariación. Se relevaron puntos craneofaciales sobre 267 cráneos de adultos y subadultos, se aplicó Análisis de Componentes Principales para establecer la variación en forma a lo largo de la ontogenia y se realizó un análisis de correlación entre las matrices de covarianza de las sucesivas edades para evaluar el cambio en los patrones de integración morfológica. Los resultados indicaron que mientras en la bóveda los patrones de covariación no cambian durante la ontogenia, esto sí ocurre en el maxilar. Los patrones de covariación de estas estructuras se comportarían en relación a la cantidad y características de las matrices asociadas

ABSTRACT Ontogenetic studies help to understand how morphological differences found among adults arise. These are the result of differential association among morphological traits, which can be due to developmental as well as functional factors. According to the functional paradigm, change in bone structures is the result of the influence of associated soft tissue, cavities and organs (functional matrix). In this work, two craniofacial structures were analysed: the vault, composed by several bones and a homogeneous functional matrix, and the maxilla, a single bone affected by diverse matrices. The hypothesis that indicates that along ontogeny covariation patterns change was tested. Landmarks were registered on 267 adult and subadult skulls. Principal Components Analysis was applied in order to assess shape variation along ontogeny. To examine ontogenetic change in the morphological integration pattern, a correlation analysis between the successive covariation matrices was carried out. The results indicate that while in the vault there are not ontogenetic differences in covariation patterns, these patterns change in the maxilla. Covariation patterns in these structures would behave according to the number and characteristics of associated matrices.

Publicado on-line:15/08/2012

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Publicado

31.03.2012

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Barbeito-Andrés, J., Sardi, M. L., Anzelmo, M., & Pucciarelli, H. M. (2012). Matrices funcionales e integración morfológica. Un estudio ontogénico de la bóveda y el maxilar/Functional matrices and morphological integration. An ontogenetic study on the vault and the maxilla. Revista Argentina De Antropología Biológica, 14(1), 79–87. Recuperado a partir de https://revistas.unlp.edu.ar/raab/article/view/506

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