1
40
1
-
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.10249" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/jmor.10249</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
276-285
Issue
3
Volume
261
Search for Full-text
Locate full-text within NEOMED Library's e-journal collections
<p>Users with a NEOMED Library login can search for full-text journal articles at the following url: <a href="https://libraryguides.neomed.edu/home">https://libraryguides.neomed.edu/home</a></p>
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
Comparative analysis of masseter fiber architecture in tree-gouging (Callithrix jacchus) and nongouging (Saguinus oedipus) callitrichids
Publisher
An entity responsible for making the resource available
Journal of Morphology
Date
A point or period of time associated with an event in the lifecycle of the resource
2004
2004-09
Subject
The topic of the resource
Anatomy & Morphology; arboreal guenons; bite force; cross-sectional area; dental; elastic energy-storage; functional-significance; internal architecture; masticatory apparatus; microwear; occlusal force; rhesus-monkeys
Creator
An entity primarily responsible for making the resource
Taylor A B; Vinyard C J
Description
An account of the resource
Common marmosets (Callithrix jacchus) and cotton-top tamarins (Saguinus oedipus) (Callitrichidae, Primates) share a broadly similar diet of fruits, insects, and tree exudates. Common marmosets, however, differ from tamarins by actively gouging trees with their anterior teeth to elicit tree exudate flow. During tree gouging, marmosets produce relatively large jaw gapes, but do not necessarily produce relatively large bite forces at the anterior teeth. We compared the fiber architecture of the masseter muscle in tree-gouging Callithrix jacchus (n = 10) to riongouging Saguinus oedipus (n = 8) to determine whether the marmoset masseter facilitates producing these large gapes during tree gouging. We predict that the marmoset masseter has relatively longer fibers and, hence, greater potential muscle excursion (i.e., a greater range of motion through increased muscle stretch). Conversely, because of the expected trade-off between excursion and force production in muscle architecture, we predict that the cotton-top tamarin masseter has more pinnate fibers and increased physiological cross-sectional area (PCSA) as compared to common marmosets. Likewise, the S. oedipus masseter is predicted to have a greater proportion of tendon relative to muscle fiber as compared to the common marmoset masseter. Common marmosets have absolutely and relatively longer masseter fibers than cotton-top tamarins. Given that fiber length is directly proportional to muscle excursion and by extension contraction velocity, this result suggests that marmosets have masseters designed for relatively greater stretching and, hence, larger gapes. Conversely, the cotton-top tamarin masseter has a greater angle of pinnation (but not significantly so), larger PCSA, and higher proportion of tendon. The significantly larger PCSA in the tamarin masseter suggests that their masseter has relatively greater force production capabilities as compared to marmosets. Collectively, these results suggest that the fiber architecture of the common marmoset masseter is part of a suite of features of the masticatory apparatus that facilitates the production of relatively large gapes during tree gouging. (C) 2004 Wiley-Liss, Inc.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1002/jmor.10249" target="_blank" rel="noreferrer noopener">10.1002/jmor.10249</a>
Format
The file format, physical medium, or dimensions of the resource
Journal Article
2004
Anatomy & Morphology
arboreal guenons
Bite Force
cross-sectional area
dental
elastic energy-storage
functional-significance
internal architecture
Journal Article
Journal of morphology
masticatory apparatus
microwear
occlusal force
rhesus-monkeys
Taylor A B
Vinyard C J