The False Vocal Folds: Shape and Size in Frontal View During Phonation Based on Laminagraphic Tracings

Agarwal, Meena; Scherer, Ronald C.; Hollien, Harry

doi:10.1016/s0892-1997(03)00012-2

Cited by 57 publications

(41 citation statements)

References 15 publications

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“…Through linear measurements used to define the size and shape of vestibular folds, it has been detected that they are farther from the vocal folds in male patients than in female patients. The angular measurements show no statistically significant difference between genders 15 . Supraglottic activity refers to the positioning and location of structures that are immediately above the vocal folds.…”

Section: Introductionmentioning

confidence: 69%

Configuração das pregas vestibulares em laringes de pacientes com nódulo vocal

Tuma

Brasil

Pontes

et al. 2005

Rev. Bras. Otorrinolaringol.

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Vocal nodules are among the most common laryngopathies that cause vocal functional disorders. The voice production mechanism is complex and demand interaction of different systems of the human body. The physiological role of the vocal folds as the glottic sound source is evident, however, there is no consensus regarding the vestibular foldsṕ articipation/influence in phonation. Aim: To verify if there is difference in the bidimensional configuration of the vestibular folds between two distinct groups of women, one with the diagnosis of vocal nodules and the other without vocal complaints and vocal fold lesions. Study design: clinical with transversal cohort. Material and Method: Ninety-six laryngeal images were evaluated, 48 from individuals without vocal complaints and 48 from patients with the diagnosis of vocal nodules. Angles were obtained and bilaterally measured in single frames of the vestibular folds during sustained phonation and those structures were morphologically classified as concave, linear or convex. Results: Among the 96 vestibular folds evaluated in each group, there was predominance of the concave form, followed by the linear and the convex ones. In the control group, there was a single convex vestibular fold, 27 were linear and 68 were concave folds. In the group of vocal nodules, 8 were convex, 15 were linear and 73 were concave folds. However, the differences among groups were not statistically significant as well as those among the angles, whose average measures were proven quite similar. Conclusion: In the female gender, the vestibular folds presented similar behavior regarding the morphology in both patients with vocal nodules and women without vocal complaints.

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Section: Introductionmentioning

confidence: 69%

Configuração das pregas vestibulares em laringes de pacientes com nódulo vocal

Tuma

Brasil

Pontes

et al. 2005

Rev. Bras. Otorrinolaringol.

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“…1(d). The overall shape and dimensions of the FVF are based on Agarwal et al (2003), who measured ten key geometric parameters of the FVF from male and female subjects using laminagraphic tracings of the larynx. In the current study, we match only the two most essential parameters: The FVF medial diameter, which is the diameter of the circle best approximating the medial contour surface of the FVF, and the FVF included surface angle, which is the intercept angle of the lines tangent to the upper and lower surfaces of the FVFs.…”

Section: Computational Modeling and Simulation Setupmentioning

confidence: 99%

Computational modeling of phonatory dynamics in a tubular three-dimensional model of the human larynx

Xue

Mittal

Zheng

et al. 2012

The Journal of the Acoustical Society of America

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Simulation of the phonatory flow-structure interaction has been conducted in a three-dimensional, tubular shaped laryngeal model that has been designed with a high level of realism with respect to the human laryngeal anatomy. A non-linear spring-based contact force model is also implemented for the purpose of representing contact in more general conditions, especially those associated with three-dimensional modeling of phonation in the presence of vocal fold pathologies. The model is used to study the effects of a moderate (20%) vocal-fold tension imbalance on the phonatory dynamics. The characteristic features of phonation for normal as well as tension-imbalanced vocal folds, such as glottal waveform, glottal jet evolution, mucosal wave-type vocal-fold motion, modal entrainment, and asymmetric glottal jet deflection have been discussed in detail and compared to established data. It is found that while a moderate level of tension asymmetry does not change the vibratory dynamics significantly, it can potentially lead to measurable deterioration in voice quality.

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“…Tomographic anatomical observations approximate the gap separating the ventricular folds h venf ranging from 2.3 to 8.3 mm ͑mean value of 6.1 mm͒ for male subjects phonating an /a/ in laryngeal mechanisms M 1 ͑equivalent to "modal" laryngeal register͒ and M 2 ͑equivalent to a "falsetto" laryngeal register͒ ͑Henrich, 2006; Roubeau et al, 2007͒ and ranging from 4.0 to 6.8 mm ͑mean value of 5.5 mm͒ for male singers performing an /a/ ͑Hollien and Colton, 1969;Wilson, 1976;Agarwal, 2004;Agarwal et al, 2003͒. The average distance from the superior-medial surfaces of the vocal folds to the minimum constriction height of the ventricular folds, L ventricle ͑see Fig.…”

Section: Anatomical Dimensionsmentioning

confidence: 99%

Influence of a constriction in the near field of the vocal folds: Physical modeling and experimental validation

Bailly

Pelorson

Henrich

et al. 2008

The Journal of the Acoustical Society of America

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The involvement of the ventricular folds is often observed in human phonation and, in particular, in pathological and or some throat-singing phonation. This study aims to explore and model the possible aerodynamic interaction between the ventricular and vocal folds using suitable in vitro setups allowing steady and unsteady flow conditions. The two experimental setups consist of a rigid and a self-oscillating vocal-fold replica, coupled to a downstream rigid ventricular-fold replica in both cases. A theoretical flow modeling is proposed to quantify the aerodynamic impact of the ventricular folds on the pressure distribution and thereby on the vocal-fold vibrations. The mechanical behavior of the vocal folds is simulated by a distributed model accounting for this impact. The influence of the ventricular constriction is measured in both flow conditions and compared to the model outcome. This study objectively evaluates the additional pressure drop implied by the presence of a ventricular constriction in the larynx. It is demonstrated that such constriction can either facilitate or impede the glottal vibrations depending on the laryngeal geometrical configuration. The relevance of using static or dynamic vocal-fold replicas is discussed.

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The False Vocal Folds: Shape and Size in Frontal View During Phonation Based on Laminagraphic Tracings

Cited by 57 publications

References 15 publications

Configuração das pregas vestibulares em laringes de pacientes com nódulo vocal

Configuração das pregas vestibulares em laringes de pacientes com nódulo vocal

Computational modeling of phonatory dynamics in a tubular three-dimensional model of the human larynx

Influence of a constriction in the near field of the vocal folds: Physical modeling and experimental validation

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