Document Detail

Open slope quotient: a new glottographic parameter.
MedLine Citation:
PMID:  7757154     Owner:  NLM     Status:  MEDLINE    
This study introduces a new objective measurement of the vibratory pattern termed the open slope quotient (OSQ). This parameter is based on the maximum slope of the photoglottographic waveform during glottal opening. Using an excised canine larynx model, the electroglottographic and photoglottographic waveforms, sound intensity, and subglottic pressure were recorded as vocal fold tension; glottic width and airflow rate were systematically varied. Multiple regression analysis of the data from nine larynges revealed OSQ to be inversely related to glottic width (p < 0.001) and vocal fold tension (p < 0.001) and directly related to glottic resistance (p < 0.001) and subglottic pressure (p < 0.001). The OSQ was better correlated with glottic width, subglottic pressure, and glottic resistance than speed quotient. OSQ is related to the velocity of vocal fold opening and laryngeal resistance. OSQ may also be related to vocal fold stiffness.
D H Slavit; T V McCaffrey
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of voice : official journal of the Voice Foundation     Volume:  9     ISSN:  0892-1997     ISO Abbreviation:  J Voice     Publication Date:  1995 Mar 
Date Detail:
Created Date:  1995-06-27     Completed Date:  1995-06-27     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  8712262     Medline TA:  J Voice     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  86-94     Citation Subset:  IM    
Department of Otolaryngology, Long Island College Hospital, Brooklyn, New York 11201, USA.
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MeSH Terms
Glottis / physiology*
Larynx / physiology*
Models, Anatomic
Voice / physiology

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

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