This Article  • References  • Full text PDF  • Reply to article  • Send to a friend  • Save in My Folder  • Save to citation manager  • Permissions  Citing Articles  • Citing articles on HighWire  • Contact me when this article is cited  Related Content  • Similar articles in this journal  Social Bookmarking   What's this?

Eriko Yanagi, MD; Thomas V. McCaffrey, MD, PhD

Arch Otolaryngol Head Neck Surg. 1992;118(1):30-36.

Abstract
• The effect of simulated thyroarytenoid and cricothyroid muscle contraction on the vibratory pattern of the vocal folds was studied in the excised canine larynx. To simulate the action of the thyroarytenoid muscle, small balloons were inflated in the paraglottic space at the level of the vocal folds. To simulate the action of the cricothyroid muscle, longitudinal tension was applied to the anterior commissure of the vocal folds. The photoglottographic and electroglottographic signals, sound intensity, and airflow rate were measured. This study showed that balloon inflation simulating thyroarytenoid muscle contraction produced an elevation of frequency of vibration with a decrease in open quotient, and that an increase in longitudinal tension simulating cricothyroid muscle contraction produced an elevation of frequency with an increase in open quotient. Vocal resistance decreased with increasing open quotient, amplitude of the photoglottographic waveform, and the frequency of vibration. Vocal efficiency increased with increasing photoglottographic amplitude and decreased with increasing frequency. The vocal efficiency peaked when the open quotient was approximately 0.5. This study suggests that glottographic parameters may be useful in assessing the effect of intrinsic laryngeal muscle activity on vocal efficiency and glottic resistance.

(Arch Otolaryngol Head Neck Surg. 1992;118:30-36)

Author Affiliations
From the Department of Otorhinolaryngology, Mayo Clinic and Mayo Foundation, Rochester, Minn.

Footnotes
Accepted for publication April 3, 1991.

Reprint requests to Department of Otorhinolaryngology, Mayo Clinic, 200 First St SW, Rochester, MN 55905 (Dr McCaffrey).

CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter     What's this?

THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES

Thyroarytenoid Muscle Activity and Infraglottic Aspect of Canine Vocal Fold Vibration
Yumoto et al.
Arch Otolaryngol Head Neck Surg 1995;121:759-764.
ABSTRACT