NDLI: Bone Growth Dynamics of the Facial Skeleton and Mandible in Gorilla gorilla and Pan troglodytes

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Bone Growth Dynamics of the Facial Skeleton and Mandible in Gorilla gorilla and Pan troglodytes

Content Provider	Springer Nature Link
Author	Martinez Maza, Cayetana Freidline, Sarah E. Strauss, Andre Nieto Diaz, Manuel
Copyright Year	2015
Abstract	Adult craniofacial morphology results from complex processes that involve growth by bone modelling and interactions of skeletal components to keep a functional and structural balance. Previous analyses of growth dynamics in humans revealed critical changes during late ontogeny explaining particular morphological features in our species. Data on bone modelling patterns from other primate species could help us to determine whether postnatal changes in the growth dynamics of the craniofacial complex are human specific or are shared with other primates. However, characterizations of bone modelling patterns through ontogeny in non-human hominids are scarce and restricted to isolated data on facial and mandibular regions. In the present study, we analyse the bone modelling patterns in an ontogenetic series of Pan and Gorilla to infer the growth dynamics of their craniofacial complex during postnatal development. Our results show that both Pan troglodytes and Gorilla gorilla are characterized by species-specific bone modelling patterns indicative of a mainly forward growth direction during postnatal development. Both species show minor but consistent ontogenetic changes in the distribution of bone modelling fields in specific regions of the face and mandible, in contrast to other regions which show more constant bone modelling patterns. In addition, we carry out a preliminary integrative study merging histological and geometric morphometric data. Both approaches yield highly complementary data, each analysis providing details on specific growth dynamics unavailable to the other. Moreover, geometric morphometric data show that ontogenetic variation in the modelling pattern of the mandibular ramus may be linked to sexual dimorphism.
Starting Page	60
Ending Page	80
Page Count	21
File Format	PDF
ISSN	00713260
Journal	Evolutionary Biology
Volume Number	43
Issue Number	1
e-ISSN	19342845
Language	English
Publisher	Springer US
Publisher Date	2015-10-15
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bone growth modelling Geometric morphometrics Primates Surface histology Morphology Cranial ontogeny Evolutionary Biology Ecology Developmental Biology Human Genetics Animal Genetics and Genomics
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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