Fifth International Workshop on Models and Analysis of Vocal Emissions for Biomedical Applications (MAVEBA 2007)

Florence, Italy
December 13-15, 2007

Mucosal Waves on the Vocal Folds: Conceptualization Based on Videokymography

J. G. Švec (1,2), M. Frič (3), F. Šram (2), H. K. Schutte (4)

(1) Laboratory of Biophysics, Dept. Experimental Physics, Palacký University Olomouc, Czech Republic
(2) Voice Research Laboratory, Dept. Phoniatrics, Medical Healthcom, Ltd., Prague, Czech Republic
(3) Musical Acoustics Research Centre, Faculty of Music AMU, Prague, Czech Republic
(4) Groningen Voice Research Lab, Dept. Biomedical Engineering, University Medical Center Groningen, University of Groningen, the Netherlands

Mucosal waves have been considered of crucial importance for healthy vocal fold vibration, but their appearance and variability have been described only vaguely so far. We studied the appearance of the mucosal waves using videokymography. The mucosal wave was divided in two components: 1) the vertical phase differences between the lower and upper margins of the vocal folds, which are reflected in sharpness of the lateral peaks in kymograms and 2) the waves propagating laterally over the vocal fold surface which can be recognized as lateral movements on the vocal fold surface occurring during medial movement of the glottal edge. Different features of the laterally traveling mucosal waves were recognized. The suggested new classification of the mucosal wave properties opens new possibilities for more sensitive monitoring of the state of the vocal fold tissues in basic voice research and clinical practice.
Index Terms. Mucosal waves, videokymography, high-speed videolaryngoscopy, vocal fold vibration

Full Paper (reprinted with permission from Firenze University Press)

Bibliographic reference.  Švec, J. G. / Frič, M. / Šram, F. / Schutte, H. K. (2007): "Mucosal waves on the vocal folds: conceptualization based on videokymography", In MAVEBA-2007, 171-172.