Telemetry System for Assessing Jaw-Muscle Function in Free-ranging Primates

Title

Telemetry System for Assessing Jaw-Muscle Function in Free-ranging Primates

Creator

Williams S; Vinyard C; Glander K; Deffenbaugh M; Teaford M; Thompson C

Publisher

International Journal of Primatology

Date

2008
2008-12

Description

In vivo laboratory-based studies describing jaw-muscle activity and mandibular bone strain during mastication provide the empirical basis for most evolutionary hypotheses linking primate masticatory apparatus form to diet. However, the laboratory data pose a potential problem for testing predictions of these hypotheses because estimates of masticatory function and performance recorded in the laboratory may lack the appropriate ecological context for understanding adaptation and evolution. For example, in laboratory studies researchers elicit rhythmic chewing using foods that may differ significantly from the diets of wild primates. Because the textural and mechanical properties of foods influence jaw-muscle activity and the resulting strains, chewing behaviors studied in the laboratory may not adequately reflect chewing behaviors of primates feeding in their natural habitats. To circumvent this limitation of laboratory-based studies of primate mastication, we developed a system for recording jaw-muscle electromyograms (EMGs) from free-ranging primates so that researchers can conduct studies of primate jaw-muscle function in vivo in the field. We used the system to record jaw-muscle EMGs from mantled howlers (Alouatta palliata) at Hacienda La Pacifica, Costa Rica. These are the first EMGs recorded from a noncaptive primate feeding in its natural habitat. Further refinements of the system will allow long-term EMG data collection so that researchers can correlate jaw-muscle function with food mechanical properties and behavioral observations. In addition to furthering understanding of primate feeding biology, our work will foster improved adaptive hypotheses explaining the evolution of primate jaw form.

Subject

Alouatta; analysis; biomechanical; bone strain; electromyography; food properties; form; galago crassicaudatus; macaca-fascicularis; mandibular symphysis; mastication; morphology; old-world monkeys; telemetry; Zoology

Format

Journal Article

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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

1441-1453

Issue

6

Volume

29

Citation

Williams S; Vinyard C; Glander K; Deffenbaugh M; Teaford M; Thompson C, “Telemetry System for Assessing Jaw-Muscle Function in Free-ranging Primates,” NEOMED Bibliography Database, accessed May 13, 2021, https://neomed.omeka.net/items/show/7599.

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