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Morphological Integration of the Modern Human Mandible during Ontogeny. | LitMetric

Morphological Integration of the Modern Human Mandible during Ontogeny.

Int J Evol Biol

Department of Math & Science, Kirkwood Community College, Iowa City Campus, Iowa City, IA 52240, USA.

Published: July 2011

AI Article Synopsis

  • Craniofacial integration is a key focus in anatomical studies, but research on mandibular integration is limited.
  • Integration patterns in human mandibles show modularization between the alveolar and muscle attachment areas, with variations depending on age.
  • Early development prioritizes space for teeth, while later stages emphasize functions related to chewing; these patterns resemble those found in other mammals, suggesting the mandible's role in skull evolution is more about adaptation than driving changes.

Article Abstract

Craniofacial integration is prevalent in anatomical modernity research. Little investigation has been done on mandibular integration. Integration patterns were quantified in a longitudinal modern human sample of mandibles. This integration pattern is one of modularization between the alveolar and muscle attachment regions, but with age-specific differences. The ascending ramus and nonalveolar portions of the corpus remain integrated throughout ontogeny. The alveolar region is dynamic, becoming modularized according to the needs of the mandible at a particular developmental stage. Early in ontogeny, this modularity reflects the need for space for the developing dentition; later, modularity is more reflective of mastication. The overall pattern of modern human mandibular integration follows the integration pattern seen in other mammals, including chimpanzees. Given the differences in craniofacial integration patterns between humans and chimpanzees, but the similarities in mandibular integration, it is likely that the mandible has played the more passive role in hominin skull evolution.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3119498PMC
http://dx.doi.org/10.4061/2011/545879DOI Listing

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