Document Detail


The Instantaneous Center of Rotation of the Mandible in Nonhuman Primates.
MedLine Citation:
PMID:  21622946     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Kinematic analyses of mandibular movement in humans demonstrate that the mandibular instantaneous center of rotation (ICoR) is commonly located near the level of the occlusal plane and varies in its position during a chewing sequence. Few data are available regarding the location of the ICoR in nonhuman primates and it remains unclear how the position of the ICoR varies in association with mastication and/or gape behaviors. ICoR was quantified throughout the gape cycle in five species of nonhuman primates (Macaca mulatta, Cebus apella, Chlorocebus aethiops, Eulemur fulvus, and Varecia variegata). The ICoR is commonly located below the mandibular condyle close to the occlusal plane and varies considerably both superoinferiorly and anteroposteriorly through the gape cycle. The path of the ICoR, and by inference condylar movement, in Macaca and Chlorocebus differs from humans whereas movement in Cebus resembles that of humans. Similarities between humans and Cebus in articular eminence and occlusal morphology may explain these resemblances. Food material properties had little influence on ICoR movement parameters.
Authors:
Claire E Terhune; Jose Iriarte-Diaz; Andrea B Taylor; Callum F Ross
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-5-27
Journal Detail:
Title:  Integrative and comparative biology     Volume:  -     ISSN:  1557-7023     ISO Abbreviation:  -     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-5-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101152341     Medline TA:  Integr Comp Biol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
*Department of Community and Family Medicine, Duke University School of Medicine, Durham, NC, USA; Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL, USA; Department of Evolutionary Anthropology, Duke University, Durham, NC, USA.
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