Morfometria do trato vocal de indivíduos disfônicos com nódulos vocais em postura de repouso: um estudo com ressonância magnética

• Ano de defesa: 2009
• Autor(a) principal: Yamasaki, Rosiane Kimiko [UNIFESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de São Paulo (UNIFESP)
• Palavras-chave em Português: Ressonância magnética nuclear; Laringe; Disfonia; Espectroscopia de ressonância magnética; Distúrbios da voz; Magnetic resonance spectroscopy; Voice disorders; Larynx; Dysphonia
• Link de acesso: http://repositorio.unifesp.br/handle/11600/9827

Objective: To analyze the morphology of the vocal tract of individuals with vocal nodules compared with that of normal subjects by means of MNR imaging at high field in rest position. Methods: Twenty young adult women, 18 to 40 years old, 10 normal and 10 with vocal nodules diagnosis participated in the present research. All participants were tested for high-field MNR to achieve images in the median sagital and transverse sections. Eighteen measurements of the vocal tract: 15 in the median sagital section and three transversal were performed. Results: Of the measurements performed in the median sagital section, it was observed that the extent of the laryngeal vestibule area was statistically lower in the dysphonic group with vocal nodules, p = 0.012. The measure of the hard palate junction point with the soft palate (PJPDM) to the top of the hyoid bone tended to be lower in the group with nodes, p = 0.085. In the cross section, the distance between the right and left vocal processes of arytenoids’ cartilages, and the distance between the anterior commissure of the glottis to the lamina of the cricoid cartilage, were also significantly lower in the dysphonic group, with p values of 0.036 and 0.010, respectively. Conclusion: Based on these results, it is concluded that patients with vocal nodules show laryngeal vestibule constriction and reduction in the opening of the vocal folds in rest position. Although the sample is too small to allow any kind of generalization of the results, the findings show that, probably, patients with vocal nodules uphold laryngeal muscle tension even at rest. Additionally, provide evidences that the surgery, as a unique treatment of vocal nodules, may not be enough.