Objective: Previous studies suggested substantial differences between adult males and females when comparing the longitudinal anterior-posterior (AP) patterns of opening and closing of the vocal folds during sustained phonation.[1] Similarly, gender differences have been reported in adults regarding the posterior glottal opening during the closed phase of the vibratory pattern. Comparative visual perceptual data in children are lacking. Since clinical endoscopic imaging is analyzed through visual perception rather than quantitative measurements,[2] the objective of this study is to conduct a systematic investigation and comparison of the AP vibratory patterns, posterior opening and mucosal wave of vocal fold oscillations in healthy children (girls and boys) and adults (women and men).
Methods: High-speed videoendoscopy recordings of the sustained phonations of 40 subjects (10 men, 10 women, 10 boys, and 10 girls) have been analyzed. For each 4,000-fps video recording; three 62.5-ms sections of stable sustained phonation were selected. Two experts detected the anterior and posterior commissure points for each section independently. Between the commissures, five equidistant kymogram lines were extracted from the video for the rating of the AP vibratory patterns and the mucosal wave.[3] This analysis was done by the two expert raters independently, inter-rater reliability was evaluated and a third rater mediated consensus.
Results and conclusion: The presentation will discuss the AP vibratory patterns, posterior glottal gap and mucosal wave ratings, as well as the statistical analysis results, comparing the findings between the four groups. Discussion of the results in comparison to other vibratory pattern and mucosal wave descriptions in literature will be provided.
References:
[1] R. F. Orlikoff , M. E. Golla, D. Deliyski. Analysis of Longitudinal Phase Differences in Vocal-Fold Vibration Using Synchronous High-Speed Videoendoscopy and Electroglottography. J Voice. 2012 Oct 9;26(6):816.e13–816.e20.
[2] M. Döllinger, D. Dubrovskiy and R. Patel. Spatiotemporal analysis of vocal fold vibrations between children and adults. Laryngoscope 2012 Vol. 122 Issue 11 Pages 2511-8
[3] R. Patel, S. N. Awan, J. Barkmeier-Kraemer, M. Courey, D. Deliyski, T. Eadie, D. Paul, J. G. _vec and R. Hillman. Recommended Protocols for Instrumental Assessment of Voice: American Speech-Language-Hearing Association Expert Panel to Develop a Protocol for Instrumental Assessment of Vocal Function. Am J Speech Lang Pathol 2018 Vol. June Issue 25 Pages 1-19