1
40
3
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Text
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URL Address
<a href="http://doi.org/10.1007/s10764-006-9083-7" target="_blank" rel="noreferrer noopener">http://doi.org/10.1007/s10764-006-9083-7</a>
Rights
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
Pages
1461-1490
Issue
5
Volume
27
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Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Cross-sectional bone distribution in the mandibles of gouging and non-gouging platyrrhini
Publisher
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International Journal of Primatology
Date
A point or period of time associated with an event in the lifecycle of the resource
2006
2006-10
Subject
The topic of the resource
bone biomechanics; callithrix-jacchus; cross-sectional geometry; form; functional-significance; iterative selection method; jaw functional morphology; load resistance; macaca-fascicularis; mandibular corpus; morphology; new-world monkeys; primates; stress; tree gouging; Zoology
Creator
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Vinyard C J; Ryan T M
Description
An account of the resource
Recent morphometric analyses have led to dissimilar conclusions about whether the jaws of tree-gouging primates are designed to resist the purportedly large forces generated during this biting behavior. We further address this question by comparing the cross-sectional geometry of the mandibular corpus and symphysis in tree-gouging common marmosets (Callithrix jacchus) to nongouging saddleback tamarins (Saguinus fuscicollis) and squirrel monkeys (Saimiri sciureus). As might be expected, based on size, squirrel monkeys tend to have absolutely larger cross-sectional areas at each tooth location sampled, while saddleback tamarins are intermediate, followed by the smaller common marmosets. Similarly, the amount and distribution of cortical bone in squirrel monkey jaws provides them with increased ability to resist sagittal bending (I (xx) ) and torsion (K) in the corpus as well as coronal bending (I (xx) ) and shearing in the symphysis. However, when the biomechanical parameters are scaled to respective load arm estimates, there are few significant differences in relative resistance abilities among the 3 species. A power analysis indicates that we cannot statistically rule out subtle changes in marmoset jaw form linked to resisting loads during gouging. Nevertheless, our results correspond to studies in vivo of jaw loading, field data, and other comparative analyses suggesting that common marmosets do not generate relatively large bite forces during tree gouging. The 3 species are like most other anthropoids in having thinner bone on the lingual than on the buccal side of the mandibular corpus at M-1. The similarity in corporal shape across anthropoids supports a hypothesized stereotypical pattern of jaw loading during chewing and may indicate a conserved pattern of mandibular growth for the suborder. Despite the overall similarity, platyrrhines may differ slightly from catarrhines in the details of their cortical bone distribution.
Identifier
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<a href="http://doi.org/10.1007/s10764-006-9083-7" target="_blank" rel="noreferrer noopener">10.1007/s10764-006-9083-7</a>
Format
The file format, physical medium, or dimensions of the resource
Journal Article
2006
bone biomechanics
callithrix-jacchus
cross-sectional geometry
form
functional-significance
international journal of primatology
iterative selection method
jaw functional morphology
Journal Article
load resistance
macaca-fascicularis
mandibular corpus
morphology
new-world monkeys
Primates
Ryan T M
Stress
tree gouging
Vinyard C J
Zoology
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.1002/jmor.10951" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/jmor.10951</a>
Rights
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
Pages
833-849
Issue
7
Volume
272
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Dublin Core
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Title
A name given to the resource
The Functional Morphology Of The Anterior Masticatory Apparatus In Tree-gouging Marmosets (cebidae, Primates)
Publisher
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Journal of Morphology
Date
A point or period of time associated with an event in the lifecycle of the resource
2011
2011-07
Subject
The topic of the resource
adductor muscle force; Anatomy & Morphology; bone; callithrix-jacchus; callitrichines; decussation; dental enamel; dietary; distribution; exudativory; fiber architecture; iterative selection method; mandible; mandibular form; stress; symphyseal fusion; teeth; thickness
Creator
An entity primarily responsible for making the resource
Hogg R T; Ravosa M J; Ryan T M; Vinyard C J
Description
An account of the resource
Although all genera of Callitrichinae feed on tree exudates, marmosets (Callithrix and Cebuella) use specialized anterior teeth to gouge holes in trees and actively stimulate exudate flow. Behavioral studies demonstrate that marmosets use large jaw gapes but do not appear to generate large bite forces (relative to maximal ability) during gouging. Nonetheless, the anterior teeth of marmosets likely experience different loads during gouging compared to nongouging platyrrhines. We use histological data from sectioned teeth, mu CTs of jaws and teeth, and in vitro tests of symphyseal strength to compare the anterior masticatory apparatus in Callithrix to nongouging tamarins (Saguinus) and other cebids. We test the hypotheses that (1) marmoset anterior teeth are adapted to accommodate relatively high stresses linked to dissipating gouging forces and (2) the mandibular symphysis does not provide increased load resistance ability compared with closely related nongouging platyrrhines. Differences in decussation between Callithrix and Saguinus are greatest in the anterior teeth, suggesting an increased load resistance ability specifically in incisor and canine enamel of Callithrix. Callithrix lower incisor crowns are labiolingually thicker suggesting increased bending resistance in this plane and improved wedging ability compared with Saguinus. Anterior tooth roots are larger relative to symphyseal bone volume in Callithrix. Anterior tooth root surface areas also are larger in marmosets for their symphyseal volume, but it remains unclear whether this relative increase is an adaptation for dissipating dental stresses versus a growth-related byproduct of relatively elongated incisors. Finally, simulated jaw loading suggests a reduced ability to withstand external forces in the Callithrix symphysis. The contrast between increased load resistance ability in the anterior dentition versus relatively reduced symphyseal strength (1) suggests a complex loading environment during gouging, (2) highlights the possibility of distinct loading patterns in the anterior teeth versus the symphysis, and (3) points to a potential mosaic pattern of dentofacial adaptations to tree gouging. J. Morphol. 272:833-849, 2011. (C) 2011 Wiley-Liss, Inc.
Identifier
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<a href="http://doi.org/10.1002/jmor.10951" target="_blank" rel="noreferrer noopener">10.1002/jmor.10951</a>
Format
The file format, physical medium, or dimensions of the resource
Journal Article or Conference Abstract Publication
2011
adductor muscle force
Anatomy & Morphology
Bone
callithrix-jacchus
callitrichines
decussation
dental enamel
Dietary
distribution
Exudativory
fiber architecture
Hogg R T
iterative selection method
Journal Article or Conference Abstract Publication
Journal of morphology
Mandible
mandibular form
Ravosa M J
Ryan T M
Stress
symphyseal fusion
Teeth
thickness
Vinyard C J
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.1002/ajpa.21178" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/ajpa.21178</a>
Rights
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
Pages
583-593
Issue
4
Volume
141
Search for Full-text
Locate full-text within NEOMED Library's e-journal collections
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Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Trabecular Bone Structure in the Mandibular Condyles of Gouging and Nongouging Platyrrhine Primates
Publisher
An entity responsible for making the resource available
American Journal of Physical Anthropology
Date
A point or period of time associated with an event in the lifecycle of the resource
2010
2010-04
Subject
The topic of the resource
Anthropology; architecture; biomechanics; bone; callithrix-jacchus; callitrichids; cancellous; cortical bone; elastic principal directions; Evolutionary Biology; femoral-head; fossil record; iterative selection method; jaw functional morphology; marmosets; mechanical properties; tamarins; temporomandibular-joint
Creator
An entity primarily responsible for making the resource
Ryan T M; Colbert M; Ketcham R A; Vinyard C J
Description
An account of the resource
The relationship between mandibular form and biomechanical function is a topic of significant interest to morphologists and paleontologists alike. Several previous studies have examined the morphology of the mandible in gouging and nongouging primates as a means of understanding the anatomical correlates of this feeding behavior. The goal of the current study was to quantify the trabecular bone structure of the mandibular condyle of gouging and nongouging primates to assess the functional morphology of the jaw in these animals. High-resolution computed tomography scan data were collected from the mandibles of five adult common marmosets (Callithrix jacchus), saddle-back tamarins (Saguinus fuscicollis), and squirrel monkeys (Saimiri sciureus), respectively, and various three-dimensional morphometric parameters were measured from the condylar trabecular bone. No significant differences were found among the taxa for most trabecular bone structural features. Importantly, no mechanically significant parameters, such as bone volume fraction and degree of anisotropy, were found to vary significantly between gouging and nongouging primates. The lack of significant differences in mechanically relevant structural parameters among these three platyrrhine taxa may suggest that gouging as a habitual dietary behavior does not involve significantly higher loads on the mandibular condyle than other masticatory behaviors. Alternatively, the similarities in trabecular architecture across these three taxa may indicate that trabecular bone is relatively unimportant mechanically in the condyle of these primates and therefore is functionally uninformative. Am J Phys Anthropol 141:583-593, 2010. (C) 2009 Wiley-Liss, Inc.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1002/ajpa.21178" target="_blank" rel="noreferrer noopener">10.1002/ajpa.21178</a>
Format
The file format, physical medium, or dimensions of the resource
Journal Article
2010
American journal of physical anthropology
Anthropology
architecture
biomechanics
Bone
callithrix-jacchus
callitrichids
cancellous
Colbert M
cortical bone
elastic principal directions
Evolutionary Biology
femoral-head
fossil record
iterative selection method
jaw functional morphology
Journal Article
Ketcham R A
marmosets
mechanical properties
Ryan T M
tamarins
temporomandibular-joint
Vinyard C J