MRI Anatomical and Morphological Differences in the Vocal Tract Between Dysphonic and Normal Adult Women

MRI Anatomical and Morphological Differences in the Vocal Tract Between Dysphonic and Normal Adult Women

Author Yamasaki, Rosiane Kimiko Autor UNIFESP Google Scholar
Behlau, Mara Autor UNIFESP Google Scholar
Brasil, Osíris de Oliveira Camponês do Autor UNIFESP Google Scholar
Yamashita, Helio Kiitiro Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract Objective. To analyze the vocal tract morphometry of women with vocal nodules (VN) compared with normal subjects by means of magnetic resonance imaging (MRI) at rest position.Study Design. Prospective study.Methods. the present research included 20 young adult women, aged 18-40 years: 10 dysphonic patients with VN and 10 normal subjects. All participants were tested using MRI; 12 measurements of the vocal tract were performed: nine in median sagittal section and three in axial section.Results. the 12 measurements were smaller in the dysphonic group; statistical significance was obtained for three parameters: in the sagittal plane, the laryngeal vestibule area was significantly smaller in the dysphonic group, with P = 0.012* (* = statistical significance); in the axial section, the distance between the right and left vocal processes of the arytenoids' cartilages and the distance between the anterior commissure of the glottis and the laryngeal posterior wall were also significantly lower in the dysphonic group, with P = 0.036* and 0.010*, respectively. Significant differences in the vocal tract morphometry of individuals with VN were observed compared with normal subjects, at rest position.Conclusions. Results obtained from this study suggest that patients with VN may present a constantly increased tension of the laryngeal muscles, even at rest; moreover, reduced anterior-posterior dimension of the larynx may be a morphological characteristic of patients with VN.
Keywords Dysphonia
Vocal nodules
Magnetic resonance imaging
Language English
Sponsor Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Date 2011-11-01
Published in Journal of Voice. New York: Mosby-Elsevier, v. 25, n. 6, p. 743-750, 2011.
ISSN 0892-1997 (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 743-750
Access rights Closed access
Type Article
Web of Science ID WOS:000297279100014

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