Control of vocal fold cover stiffness by laryngeal muscles: a preliminary study

The Laryngoscope
Dinesh K ChhetriEric Goodyer

Abstract

To perform preliminary measurements of the shear modulus of the vocal fold cover layer during intrinsic laryngeal muscle contraction. Shear modulus was measured in an in vivo canine larynx and an ex vivo human larynx. Shear stress was applied to the transverse axis of the vocal fold using a modified linear skin rheometer (LSR) via an attached suction probe. The probe displacement in response to the applied force was measured at various levels of laryngeal muscle contraction. The force-displacement data were used to derive the shear modulus using a simple shear model. In the ex vivo human larynx, lateral cricoarytenoid (LCA) muscle and cricothyroid (CT) muscle activity was simulated with arytenoid adduction and cricothyroid approximation sutures, respectively. In the in vivo canine, adductor muscle and CT muscle contraction was induced with graded stimulation of the recurrent laryngeal nerve (RLN) and the superior laryngeal nerves (SLN), respectively. : Baseline shear modulus was between 1,076 and 1,307 Pascals. In the ex vivo human larynx, the shear modulus increased gradually to a maximum of 1.6 times baseline value with graded arytenoid adduction and 3.7 times baseline value with cricothyroid approximation. In the in vivo lar...Continue Reading

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Citations

Dec 22, 2010·Journal of Speech, Language, and Hearing Research : JSLHR·Christopher R KrausertJack J Jiang
Apr 12, 2011·The Journal of the Acoustical Society of America·Bastian SchmidtMichael Döllinger
Aug 10, 2013·The Journal of the Acoustical Society of America·Bastian SchmidtMichael Döllinger
Jul 11, 2014·Journal of Voice : Official Journal of the Voice Foundation·Amir K Miri
Feb 23, 2010·Journal of Voice : Official Journal of the Voice Foundation·Dinesh K ChhetriJuergen Neubauer
Mar 24, 2011·IEEE Transactions on Bio-medical Engineering·Björn HuttnerMichael Döllinger
Apr 30, 2016·Materials Science & Engineering. C, Materials for Biological Applications·Gregory R DionRyan C Branski
Oct 31, 2016·The Journal of the Acoustical Society of America·Zhaoyan Zhang
Nov 23, 2016·The Laryngoscope·Gregory R DionRyan C Branski
Mar 5, 2020·Laryngoscope Investigative Otolaryngology·Brian H CameronDinesh K Chhetri
Mar 9, 2021·Journal of Voice : Official Journal of the Voice Foundation·Carlos CalvacheLina Peñuela
Nov 13, 2009·Current Opinion in Otolaryngology & Head and Neck Surgery
Nov 17, 2021·The Laryngoscope·Shaghauyegh S Azar, Dinesh K Chhetri

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