Correspondence of electroglottographic closed quotient to vocal fold impact stress in excised canine larynges

Katherine Verdolini; Roger Chan; Ingo R. Titze; Markus Hess; Wolfgang Bierhals

doi:10.1016/S0892-1997(98)80050-7

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Correspondence of electroglottographic closed quotient to vocal fold impact stress in excised canine larynges

Journal article

Peer reviewed

Correspondence of electroglottographic closed quotient to vocal fold impact stress in excised canine larynges

Katherine Verdolini, Roger Chan, Ingo R. Titze, Markus Hess and Wolfgang Bierhals

Journal of voice, Vol.12(4), pp.415-423

12/01/1998

DOI: 10.1016/S0892-1997(98)80050-7

PMID: 9988028

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Abstract

The purpose of this study was to explore the possible use of the electroglottographic closed quotient (EGG CQ) as a noninvasive estimate of vocal fold impact stress (SI). Two excised canine larynges were used. Each larynx was mounted and vocal fold oscillation was induced using a humidified air source. Twentyseven experimental trials were conducted for each larynx. Trials involved variations in vocal process gap, vocal fold elongation, and subglottic pressure. Simultaneous measures were made of vocal fold SI at the midpoint of the membranous vocal folds, and EGG CQ (dimensionless ratio). The results indicated that when threshold and saturation effects were excluded, the SI and the CQ were strongly related (linear correlation r = .83 and .96 for the two individual larynges, and .81 for the combined data). Within the region of linear relation, an increase of .15 in the CQ corresponded to about 1 kPa increase in SI for the combined data. Discussion focuses on possible clinical implications and the likely reasons for threshold and saturation phenomena.

Closed quotient

Electroglottography

Excised larynx

Intraglottal impact stress

Intraglottal SI

Vocal folds

Details

Title: Subtitle: Correspondence of electroglottographic closed quotient to vocal fold impact stress in excised canine larynges
Creators: Katherine Verdolini - Beth Israel Deaconess Medical Center
Roger Chan - University of Iowa
Ingo R. Titze - University of Iowa
Markus Hess - Freie Universität Berlin
Wolfgang Bierhals - Freie Universität Berlin
Resource Type: Journal article
Publication Details: Journal of voice, Vol.12(4), pp.415-423
Publisher: Mosby, Inc
DOI: 10.1016/S0892-1997(98)80050-7
PMID: 9988028
ISSN: 0892-1997
eISSN: 1873-4588
Number of pages: 9
Language: English
Date published: 12/01/1998
Academic Unit: School of Music; Communication Sciences and Disorders
Record Identifier: 9984719568802771

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