Vestibular vocal fold behavior during phonation in unilateral vocal fold paralysis

Pinho, Sílvia Maria Rebelo; Pontes, Paulo; Gadelha, Maria Emília Cardoso; Biasi, Noemi

doi:10.1016/s0892-1997(99)80059-9

Cited by 47 publications

(55 citation statements)

References 13 publications

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“…In our study, the paramedian and intermediate positions were the ones most commonly found (Table 1), in agreement with the results from other studies 2,24 . Other authors 25,32 found results which differ from the ones we found, since they argued that the median and paramedian positions were the most frequently found in their sample. The mechanisms responsible for the vocal fold positions are still unknown; notwithstanding, there are studies arguing that it may be affected by the degree of reinervation, as well as by the fibrosis of the denervated muscles 31,33 .…”

Section: Discussioncontrasting

confidence: 98%

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Voz e posição de prega vocal em homens com paralisia unilateral de prega vocal

Schwarz¹,

Cielo²,

Steffen³

et al. 2011

Braz. j. otorhinolaryngol. (Impr.)

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The paralyzed vocal fold positioning and the degree of dysphonia are important inputs when one is deciding upon treatment options for unilateral vocal fold paralysis (UVFP).Objective: To check voice characteristics and paralyzed vocal fold position in men with UVFP. Materials and Methods:This is a retrospective historical cross-sectional cohort study, with data from 24 men with UVFP with mean age of 60.7 years, submitted to voice assessment by three speech therapists and three ENT physicians used laryngeal images to classify the position of the paralyzed vocal fold. Results:The paralyzed vocal fold was found in the paramedian position in 45.83% of the cases; in the intermediary position in 25%; lateral in 20.83%, and it was in the median position in 4.16%; the dysphonia resulting from the UVFP was characterized by moderate hoarseness, roughness and stress in the voice; breathiness (most had severe breathiness); weakness and instability(mostly mild); the position of the paralyzed vocal fold had a significant influence on the general degree of vocal deviation. Conclusion:The general degree of dysphonia is associated with the paralyzed vocal fold position; dysphonia is characterized by hoarseness, breathiness, roughness and stress of moderate to severe levels. Braz J Otorhinolaryngol. 2011;77(6):761-7. ORIGINAL ARTICLE

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Section: Discussioncontrasting

confidence: 98%

“…Some of the UVFP studies are in agreement with such finding 24,25 . The greatest occurrence of lesions on the left side is associated with the difference in the anatomical course of the recurrent laryngeal nerve, which is long and partially intrathoracic, and it can also be affected by mediastinal diseases.…”

Section: Discussionsupporting

confidence: 82%

Voz e posição de prega vocal em homens com paralisia unilateral de prega vocal

Schwarz¹,

Cielo²,

Steffen³

et al. 2011

Braz. j. otorhinolaryngol. (Impr.)

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“…They are not commonly involved during ordinary speech. Yet, their adduction has been observed in voice disorders such as ventricular dysphonia cases, where their interference in phonation may occur as a compensatory function ͑Nasri et al, 1996;Pinho et al, 1999͒. Although their physical properties ͑high viscosity and low stiffness͒ are different from those of biomechanical oscillators such as the vocal folds ͑Agarwal, 2004͒, their vibration has been observed during pathological ͑Nasri et al, 1996͒ and some throat-singing productions found in Asian culturesMongolian Kargyraa, Tibetan Dzo-ke chants ͑Fuks et Lindestad et al, 2001;Sakakibara et al, 2001 The effects of the ventricular folds in phonation are still poorly understood.…”

Section: Introductionmentioning

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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“…Vestibular folds during phonation mechanism apply strong tension to arytenoid cartilages and simultaneously pull upwards aryepiglottic folds, widening the ventricle and providing space to higher amplitude of vocal fold vibration 24 . Phonation disorders associated with vestibular fold structure are related in the medical literature as ventricular dysphonia or vestibular dysphonia [25][26][27] . This type of dysphonia may occur as a compensation owing to laryngeal anatomical or physiological affections or as an isolated hypertrophy of vestibular fold 28 .…”

Section: Introductionmentioning

confidence: 99%

Configuração das pregas vestibulares à fonação em adultos com e sem disfonia

Nemetz

Pontes

Vieira

et al. 2005

Rev. Bras. Otorrinolaringol.

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As pregas vestibulares participam da emissão vocal com mudanças evidentes de posição e forma durante este processo, porém pouco ou quase nada se conhece sobre o significado desta participação e como se iniciam estes movimentos ativos que mudam sua forma e contorno. Entendemos que o conhecimento da participação das pregas vestibulares na fisiologia laríngea possa ter importante aplicação prática, pois permitirá avaliar melhor o comprometimento funcional em condições patológicas, o que auxiliará na definição de estratégias para o adequado tratamento. OBJETIVO: Estudar a configuração da prega vestibular durante a fonação (emissão sustentada do /µ/) comparando exames de indivíduos sem queixa vocal (grupo eufonia) com portadores de queixa de voz (grupo disfonia). FORMA DE ESTUDO: Coorte transversal simples. MATERIAL E MÉTODO: Foram analisados 120 registros de imagens de laringes, sendo 60 de indivíduos eufônicos e 60 de disfônicos, constituído cada grupo de igual número de indivíduos em relação ao gênero. Foi identificada a posição da borda livre de prega vestibular em relação a uma reta que une as inserções anterior e posterior da mesma. Na dependência desta posição, foram descritos três tipos de configurações: côncava, quando estava em posição lateral, convexa quando em posição medial e linear quando paralela ou se sobrepunha. RESULTADOS: Das 240 pregas vestibulares, 158 eram côncavas, 41 convexas e 31 lineares. A forma côncava predominou nos dois grupos em relação às outras, porém as formas convexa e linear aumentaram no grupo disfonia. No feminino, a forma linear teve aumento significante no grupo disfonia, enquanto no masculino o aumento significante ocorreu na forma convexa. CONCLUSÃO: Existe diferença no comportamento da prega vestibular no grupo disfonia em relação à eufonia, sendo que esta diferença ocorre de forma diversa em relação aos gêneros.

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Vestibular vocal fold behavior during phonation in unilateral vocal fold paralysis

Cited by 47 publications

References 13 publications

Voz e posição de prega vocal em homens com paralisia unilateral de prega vocal

Voz e posição de prega vocal em homens com paralisia unilateral de prega vocal

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

Configuração das pregas vestibulares à fonação em adultos com e sem disfonia

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