PURPOSE: The goals of this study were to determine if there were significant differences between singers and nonsingers in the morphology of vocal nodules and the associated impact on vocal function. METHOD: Participants were 10 professionally trained singers with nodules, eight nonsingers with nodules, and 10 individuals with healthy normal voice (controls). Surface electromyography (sEMG) from three anterior neck locations and acoustic rise times for vowels /a/ and /i/ were measured in all the participants. In individuals with nodules, dB SPL/cm H(2)O, glottal airflow, and nodule location and size were also measured. RESULTS: There were no significant differences between singers and nonsingers with nodules in terms of airflow, dB SPL/cm H(2)O, nodule size, or nodule location. In nonsingers with nodules, airflow and nodule size were significantly correlated, but were not significantly correlated in singers. Vowel rise times and sEMG during vocal tasks did not differentiate among nodule and control groups. Sternocleidomastoid sEMG during initiation of the vowel /a/ was statistically significantly stronger in nonsingers with nodules relative to singers with nodules and controls. CONCLUSIONS: Nodule morphology did not differ between singers and nonsingers, although some behavioral aspects of phonation differed between the groups.
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机译：目的：本研究的目的是确定歌手和非歌手之间在声带结节的形态以及对声带功能的影响上是否存在显着差异。方法：参与者为10名经过专业训练的结节歌手，8名非结节歌手和10名正常声音正常的人（对照）。在所有参与者中测量了三个前颈部位置的表面肌电图（sEMG）和元音/ a /和/ i /的声音上升时间。在有结节的个体中，还测量了dB SPL / cm H（2）O，声门气流以及结节的位置和大小。结果：有结节的歌手和没有结节的歌手在气流，dB SPL / cm H（2）O，结节大小或结节位置方面均无显着差异。在非结节性歌手中，气流和结节大小显着相关，而在歌手中则无显着相关性。在发声任务中元音上升时间和sEMG在结节组和对照组之间没有区别。相对于有结节和对照的歌手，在有结节的非歌手中元音/ a /发出期间，胸锁乳突肌sEMG在统计学上明显更强。结论：歌手和非歌手之间的结节形态无差异，尽管各组之间发声的某些行为方面有所不同。
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