Journal article
Aerodynamic and Nonlinear Dynamic Acoustic Analysis of Tension Asymmetry in Excised Canine Larynges
Journal of speech, language, and hearing research, Vol.55(6), pp.1850-1861
12/01/2012
DOI: 10.1044/1092-4388(2012/11-0240)
PMCID: PMC3593670
PMID: 22562826
Abstract
Purpose: To model tension asymmetry caused by superior laryngeal nerve paralysis (SLNP) in excised larynges and apply perturbation, nonlinear dynamic, and aerodynamic analyses.
Method: SLNP was modeled in 8 excised larynges using sutures and weights to mimic cricothyroid (CT) muscle function. Weights were removed from one side to create tension asymmetry, mimicking unilateral SLNP. Two sets of weights were used, 1 light and 1 heavy. Five conditions were evaluated: (a) no tension, (b) symmetrical light tension, (c) asymmetrical light tension, (d) symmetrical heavy tension, and (e) asymmetrical heavy tension.
Results: Perturbation parameters were not significantly different across conditions: percent jitter, chi(2)(4) = 3.70, p = .451; percent shimmer, F(4) = 0.95, p = .321. In addition, many measurements were invalid (error values >10). Second-order entropy was significantly different across conditions, F(4) = 5.432, p = .002, whereas correlation dimension was not, F(4) = 0.99, p = .428. Validity of these nonlinear dynamic parameters was demonstrated by low standard deviations. Phonation threshold pressure, chi(2)(4) = 22.50, p < .001, and power, chi(2)(4) = 9.50, p = .05, differed significantly across conditions, whereas phonation threshold flow did not, chi(2)(4) = 4.08, p = .396.
Conclusions: Nonlinear dynamic analysis differentiated between symmetrical and asymmetrical tension conditions, whereas traditional perturbation analysis was less useful in characterizing type 2 or 3 vocal signals. Supplementing acoustic with aerodynamic parameters may help distinguish among laryngeal disorders of neuromuscular origin.
Details
- Title: Subtitle
- Aerodynamic and Nonlinear Dynamic Acoustic Analysis of Tension Asymmetry in Excised Canine Larynges
- Creators
- Erin E. Devine - University of Wisconsin–MadisonErin E. Bulleit - University of Wisconsin–MadisonMatthew R. Hoffman - University of Wisconsin–MadisonTimothy M. McCulloch - University of Wisconsin–MadisonJack J. Jiang - University of Wisconsin–Madison
- Resource Type
- Journal article
- Publication Details
- Journal of speech, language, and hearing research, Vol.55(6), pp.1850-1861
- DOI
- 10.1044/1092-4388(2012/11-0240)
- PMID
- 22562826
- PMCID
- PMC3593670
- NLM abbreviation
- J Speech Lang Hear Res
- ISSN
- 1092-4388
- eISSN
- 1558-9102
- Publisher
- Amer Speech-Language-Hearing Assoc
- Number of pages
- 12
- Grant note
- R01DC008850 / NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute on Deafness & Other Communication Disorders (NIDCD) R01 DC008153; R01 DC005522; R01 DC008850; T32 DC009401 / National Institute on Deafness and Other Communication Disorders; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute on Deafness & Other Communication Disorders (NIDCD)
- Language
- English
- Date published
- 12/01/2012
- Academic Unit
- Otolaryngology
- Record Identifier
- 9984366277002771
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