Journal article
Cervids with different vocal behavior demonstrate different viscoelastic properties of their vocal folds
Journal of morphology (1931), Vol.271(1), pp.1-11
01/2010
DOI: 10.1002/jmor.10774
PMCID: PMC3915299
PMID: 19603411
Abstract
The authors test the hypothesis that vocal fold morphology and biomechanical properties covary with species-specific vocal function. They investigate mule deer (Odocoileus hemionus) vocal folds, building on, and extending data on a related cervid, the Rocky Mountain elk (Cervus elaphus nelsoni). The mule deer, in contrast to the elk, is a species with relatively little vocal activity in adult animals. Mule deer and elk vocal folds show the typical three components of the mammalian vocal fold (epithelium, lamina propria and thyroarytenoid muscle). The vocal fold epithelium and the lamina propria were investigated in two sets of tensile tests. First, creep rupture tests demonstrated that ultimate stress in mule deer lamina propria is of the same magnitude as in elk. Second, cyclic loading tests revealed similar elastic moduli for the vocal fold epithelium in mule deer and elk. The elastic modulus of the lamina propria is also similar between the two species in the low-strain region, but differs at strains larger than 0.3. Sex differences in the stress-strain response, which have been reported for elk and human vocal folds, were not found for mule deer vocal folds. The laminae propriae in mule deer and elk vocal folds are comparatively large. In general, a thick and uniformly stiff lamina propria does not self-oscillate well, even when high subglottic pressure is applied. If the less stiff vocal fold seen in elk is associated with a differentiated lamina propria it would allow the vocal fold to vibrate at high tension and high subglottic pressure. The results of this study support the hypothesis that viscoelastic properties of vocal folds varies with function and vocal behavior.
Details
- Title: Subtitle
- Cervids with different vocal behavior demonstrate different viscoelastic properties of their vocal folds
- Creators
- Tobias Riede - University of UtahSusan Lingle - University of WinnipegEric J HunterIngo R Titze - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of morphology (1931), Vol.271(1), pp.1-11
- DOI
- 10.1002/jmor.10774
- PMID
- 19603411
- PMCID
- PMC3915299
- ISSN
- 0362-2525
- eISSN
- 1097-4687
- Grant note
- R01 DC008612-01A1 / NIDCD NIH HHS R01 DC008612-03 / NIDCD NIH HHS R01 DC008612-05 / NIDCD NIH HHS R01 DC008612-06 / NIDCD NIH HHS R01 DC008612-04 / NIDCD NIH HHS R01 DC008612-02 / NIDCD NIH HHS R01 DC008612 / NIDCD NIH HHS
- Language
- English
- Date published
- 01/2010
- Academic Unit
- School of Music; Communication Sciences and Disorders
- Record Identifier
- 9984446416002771
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