Laryngeal Imaging Study of Glottal Attack/Offset Time in Adductor Spasmodic Dysphonia during Connected Speech

Adductor spasmodic dysphonia (AdSD) disrupts laryngeal muscle control during speech and, therefore, affects the onset and offset of phonation. In this study, the goal is to use laryngeal high-speed videoendoscopy (HSV) to measure the glottal attack time (GAT) and glottal offset time (GOT) during con...

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Bibliographic Details
Published in:	Applied sciences Vol. 13; no. 5; p. 2979
Main Authors:	Naghibolhosseini, Maryam, Zacharias, Stephanie R C, Zenas, Sarah, Levesque, Farrah, Deliyski, Dimitar D
Format:	Journal Article
Language:	English
Published:	Switzerland MDPI AG 01-03-2023
Subjects:	Acoustics adductor spasmodic dysphonia Automation Cameras connected speech Data analysis Diagnosis Generalized linear models glottal attack time glottal offset time high-speed videoendoscopy laryngeal imaging Muscles Phonation Speech adductor spasmodic dysphonia high-speed videoendoscopy laryngeal imaging glottal offset time connected speech glottal attack time
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Summary:	Adductor spasmodic dysphonia (AdSD) disrupts laryngeal muscle control during speech and, therefore, affects the onset and offset of phonation. In this study, the goal is to use laryngeal high-speed videoendoscopy (HSV) to measure the glottal attack time (GAT) and glottal offset time (GOT) during connected speech for normophonic (vocally normal) and AdSD voices. A monochrome HSV system was used to record readings of six CAPE-V sentences and part of the "Rainbow Passage" from the participants. Three raters visually analyzed the HSV data using a playback software to measure the GAT and GOT. The results show that the GAT was greater in the AdSD group than in the normophonic group; however, the clinical significance of the amount of this difference needs to be studied further. More variability was observed in both GATs and GOTs of the disorder group. Additionally, the GAT and GOT time series were found to be nonstationary for the AdSD group while they were stationary for the normophonic voices. This study shows that the GAT and GOT measures can be potentially used as objective markers to characterize AdSD. The findings will potentially help in the development of standardized measures for voice evaluation and the accurate diagnosis of AdSD.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Author Contributions: Conceptualization, M.N., S.R.C.Z., S.Z. and D.D.D.; methodology, M.N. and S.Z., and F.L.; formal analysis, M.N., S.Z. and F.L.; investigation, M.N., S.R.C.Z. and D.D.D.; resources, M.N., S.R.C.Z. and D.D.D.; writing—original draft preparation, M.N.; writing—review and editing, M.N., S.R.C.Z. and D.D.D.; supervision, M.N.; funding acquisition, M.N. and D.D.D. All authors have read and agreed to the published version of the manuscript.
ISSN:	2076-3417 2076-3417
DOI:	10.3390/app13052979