The dynamics of length change in canine vocal folds |
| |
Authors: | Ingo R. Titze Jack J. Jiang Emily Lin |
| |
Affiliation: | *National Center for Voice and Speech and Department of Speech Pathology and Audiology, The University of Iowa, Iowa City, Iowa, USA;†Department of Otolaryngology-Head and Neck Surgery, Northwestern University School ofMedicine, Chicago, Illinois, U.S.A. |
| |
Abstract: | The time courses of vocal fold elongation and contraction have beenmeasured as a function of intrinsic laryngeal muscle activity. The superior and recurrent laryngeal nerves of anesthetized canines were stimulated supramaximally (on-off in all combinations) while the vocal folds were surgically exposed and illuminated for conventional and higher speed (300 frames per second) video recording. Microsutures were placed on various points on the vocal folds to measure elongation and contraction. Vocal fold strain, defined as elongation divided by rest length, ranged from −17% to +45%. The typical time constant for exponential increase or decrease in strain was about 30 ms. This reflects primarily the intrinsic muscle activation times rather than a passive (inertial or viscoelastic) response of cricothyroid joint rotation or translation. |
| |
Keywords: | Vocal fold Length Pitch Canine |
本文献已被 ScienceDirect 等数据库收录! |
|