Elastic models of vocal fold tissues.
Elastic properties of canine vocal fold tissue (muscle and mucosa) were obtained through a series of experiments conducted in vitro and were modeled mathematically. The elastic properties play a significant role in quantitative analysis of vocal fold vibrations and theory of pitch control. Samples of vocalis muscle and mucosa were dissected and prepared from dog larynges a few minutes premortem and kept in a Krebs solution at a temperature of 37 +/- 1 degrees C and a pH of 7.4 +/- 0.05. Samples of muscle tissue and mucosa were stretched and released in a slow, sinusoidal fashion. Force and displacement of the samples were measured with a dual-servo system (ergometer). After digitization, stress-strain data for samples of muscle tissue and cover tissue were averaged. The stress-strain data were then fitted numerically by polynomial and exponential models.
Department of Speech Pathology and Audiology, University of Iowa, Iowa City 52242.
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D000818:Animals; D004285:Dogs; D004548:Elasticity; D008953:Models, Anatomic; D008962:Models, Theoretical; D009119:Muscle Contraction / Q000502:physiology*; D014827:Vocal Cords / Q000502:physiology*