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Full text of this paper is not available in the ETD Center. Copies may be available for inter-library loan from University of Cincinnati or may be available for purchase from Proquest/UMI

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LARYNGEAL FUNCTION AND VOCAL FATIGUE AFTER PROLONGED LOUD READING IN INDIVIDUALS WITH UNILATERAL VOCAL FOLD PARALYSIS

KELCHNER, LISA NELSON
http://rave.ohiolink.edu/etdc/view?acc_num=ucin997892263

Abstract Details

2001, PhD, University of Cincinnati, Allied Health Sciences : Communication Sciences and Disorders.
The purpose of the present study was to examine the effect of prolonged loud reading, intended to induce fatigue, on vocal function in adults with unilateral vocal fold paralysis (UVFP). Subjects were 20 adults, 37-60 years old, with UVFP secondary to recurrent laryngeal nerve paralysis. Subjects were asked to read continuously for as long and as loud as they could until they felt fatigued and wished to stop. Demographic and etiologic data were collected for each subject. Subjective ratings and instrumental (acoustic, aerodynamic, and videoendoscopic) measures of vocal function were obtained before and after reading. Acoustic and aerodynamic measures were collected for comfortable, high, and low pitches. Statistical analysis revealed subjects rated their vocal quality and physical effort for voicing more severely following prolonged loud reading, whereas expert raters did not detect a significant perceptual difference in vocal quality. Reading fundamental frequency (Fo) was significantly elevated following prolonged loud reading, as were mean airflow rates at all pitch conditions. Maximum phonation times for comfort and low pitches significantly decreased during posttests. Multiple regression analyses revealed significant associations between ratings of posttest physical effort and posttest measures of: reading Fo, low pitch noise to harmonics (N/H) ratio, mean airflow rates, high pitch maximum phonation time, glottic closure, supraglottic compression, and vocal fold edge. A significant association between total minutes read and the posttest acoustic measure of pitch range-lowest end and glottic closure was demonstrated. A multiple correlation analysis revealed no significant correlations between position of the paralyzed vocal fold and posttest ratings of physical effort, total minutes read, gender, or onset of paralysis. Interpretation of results indicates the prolonged loud reading task was successful in vocally fatiguing most of the UVFP subjects. Post-reading vocal fatigue was marked by changes in perceptual and kinesthetic sensations heard and felt by the subjects, as well as changes in instrumental values. Those values suggest that key physiologic correlates of vocal fatigue, in individuals with UVFP, include further reduction of glottic efficiency, resulting in decreased regulation of glottic airflow and a temporary destabilization of speaking fundamental frequency.
Dr. Linda Lee (Advisor)
1 p.
Health Sciences, Speech Pathology
vocal fatigue; voice disorders; unilateral vocal fold paralysis

Recommended Citations

Citations

  • KELCHNER, L. N. (2001). LARYNGEAL FUNCTION AND VOCAL FATIGUE AFTER PROLONGED LOUD READING IN INDIVIDUALS WITH UNILATERAL VOCAL FOLD PARALYSIS [Doctoral dissertation, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin997892263

    APA Style (7th edition)

  • KELCHNER, LISA. LARYNGEAL FUNCTION AND VOCAL FATIGUE AFTER PROLONGED LOUD READING IN INDIVIDUALS WITH UNILATERAL VOCAL FOLD PARALYSIS. 2001. University of Cincinnati, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin997892263.

    MLA Style (8th edition)

  • KELCHNER, LISA. "LARYNGEAL FUNCTION AND VOCAL FATIGUE AFTER PROLONGED LOUD READING IN INDIVIDUALS WITH UNILATERAL VOCAL FOLD PARALYSIS." Doctoral dissertation, University of Cincinnati, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin997892263

    Chicago Manual of Style (17th edition)

ucin997892263
© 2001, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.