A Two-dimensional Biomechanical Model of Vocal Fold Posturing.
From: Department of Speech Pathology and Audiology, The University of Iowa, Iowa City 52242, USA. ingo-titze@dcpa.org
The Journal of the Acoustical Society of America
- Publish Date: Apr 2007
- ISSN: 0001-4966
- Volume: 121
- Issue: 4
- Pages: 2254-60
- Medium: Print
- Language: English
- Citation (JAMA): Titze Ingo R, Hunter Eric J, et al. A Two-dimensional Biomechanical Model of Vocal Fold Posturing.. J. Acoust. Soc. Am. Apr 2007;121:2254-60
Abstract
The forces and torques governing effective two-dimensional (2D) translation and rotation of the laryngeal cartilages (cricoid, thyroid, and arytenoids) are quantified on the basis of more complex three-dimensional movement. The motions between these cartilages define the elongation and adduction (collectively referred to as posturing) of the vocal folds. Activations of the five intrinsic laryngeal muscles, the cricothyroid, thyroarytenoid, lateral cricoarytenoid, posterior cricoarytenoid, and interarytenoid are programmed as inputs, in isolation and in combination, to produce the dynamics of 2D posturing. Parameters for the muscles are maximum active stress, passive stress, activation time, contraction time, and maximum shortening velocity. The model accepts measured electromyographic signals as inputs. A repeated adductory-abductory gesture in the form /hi-hi-hi-hi-hi/ is modeled with electromyographic inputs. Movement and acoustic outputs are compared between simulation and measurement.
Mesh Headings (Keywords): Arytenoid Cartilage, Biomechanics, Cricoid Cartilage, Humans, Models, Anatomic, Speech, Vocal Cords
Check for Full Text / PubMed Unique Identifier (PMID): 17471739
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