Document Detail


Variability of normal vocal fold dynamics for different vocal loading in one healthy subject investigated by phonovibrograms.
MedLine Citation:
PMID:  18313896     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We investigate the potential of high-speed digital imaging technique (HSI) and the phonovibrogram (PVG) analysis in normal vocal fold dynamics by studying the effects of continuous voice use (vocal loading) during the workday. One healthy subject was recorded at sustained phonation 13 times within 2 consecutive days in the morning before and in the afternoon after vocal loading, respectively. Vocal fold dynamics were extracted and visualized by PVGs. The characteristic PVG patterns were extracted representing vocal fold vibration types. The parameter values were then analyzed by statistics regarding vocal load, left-right PVG asymmetries, anterior-posterior PVG asymmetries, and opening-closing differences. For the first time, the direct impact of vocal load could be determined by analyzing vocal fold dynamics. For same vocal loading conditions, equal dynamical behavior of the vocal folds were confirmed. Comparison of recordings performed in the morning with the recordings after work revealed significant changes in vibration behavior, indicating impact of occurring vocal load. Left-right asymmetries in vocal fold dynamics were found confirming earlier assumptions. Different dynamics between opening and closing procedure as well as for anterior and posterior parts were found. Constant voice usage stresses the vocal folds even in healthy subjects and can be detected by applying the PVG technique. Furthermore, left-right PVG asymmetries do occur in healthy voice to a certain extent. HSI in combination with PVG analysis seems to be a promising tool for investigation of vocal fold fatigue and pathologies resulting in small forms of dynamical changes.
Authors:
Michael Doellinger; Joerg Lohscheller; Andrew McWhorter; Melda Kunduk
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-03-03
Journal Detail:
Title:  Journal of voice : official journal of the Voice Foundation     Volume:  23     ISSN:  1873-4588     ISO Abbreviation:  J Voice     Publication Date:  2009 Mar 
Date Detail:
Created Date:  2009-03-09     Completed Date:  2009-07-16     Revised Date:  2013-05-02    
Medline Journal Info:
Nlm Unique ID:  8712262     Medline TA:  J Voice     Country:  United States    
Other Details:
Languages:  eng     Pagination:  175-81     Citation Subset:  IM    
Affiliation:
Department of Phoniatrics and Pediatric Audiology, University Hospital Erlangen, Medical School, Erlangen, Germany. michael.doellinger@uk-erlangen.de
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MeSH Terms
Descriptor/Qualifier:
Analysis of Variance
Female
Functional Laterality
Humans
Laryngoscopy
Periodicity
Reproducibility of Results
Vibration
Video Recording
Vocal Cords / physiology*
Voice*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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