Document Detail


Independence of biomechanical forces and craniofacial pneumatization in Cebus.
MedLine Citation:
PMID:  18951480     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Several different factors have been hypothesized as explanations of variation in primate paranasal sinus size. Biomechanical forces, particularly those associated with mastication, are frequently evoked to account for differences in primate craniofacial pneumatization. To test whether masticatory stresses are responsible for maxillary sinus volume diversity, two platyrrhine species of the genus Cebus (C. apella and C. albifrons) were examined. The former has been identified as a hard object feeder, and many morphological differences between the two species are attributable to differences in the mechanical properties of their respective diets. Sinus volumes were derived from serial coronal CT scans of the crania of adults. Several external cranial measurements were used to scale sinus volume relative to the size of the face. Relative measures of maxillary sinus volume were compared using standard statistical techniques. In all comparisons, the two capuchin species do not differ from one another significantly at P < 0.05. Thus, this "natural experiment" fails to support the interpretation that biomechanical forces acting on the facial skeleton substantially affect the degree of paranasal pneumatization in primates. This result suggests that it is unlikely that the maxillary sinus performs any function in relation to masticatory stress; other factors must be responsible for the variation in sinus volume among primates.
Authors:
Todd C Rae; Thomas Koppe
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Anatomical record (Hoboken, N.J. : 2007)     Volume:  291     ISSN:  1932-8494     ISO Abbreviation:  Anat Rec (Hoboken)     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-10-30     Completed Date:  2008-12-31     Revised Date:  2009-12-16    
Medline Journal Info:
Nlm Unique ID:  101292775     Medline TA:  Anat Rec (Hoboken)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1414-9     Citation Subset:  IM    
Copyright Information:
Copyright 2008 Wiley-Liss, Inc.
Affiliation:
Department of Anthropology, Evolutionary Anthropology Research Group, Durham University, Durham DH1 3HN, United Kingdom. T.Rae@roehampton.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Animals
Biomechanics*
Body Temperature Regulation / physiology
Cebus / anatomy & histology*,  physiology*
Face / anatomy & histology*,  physiology*
Humans
Organ Size
Postural Balance / physiology
Skull / anatomy & histology*,  physiology*,  radiography
Smell / physiology
Tomography, X-Ray Computed
Voice / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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