Speech-Language and Hearing Disorders Department, Bauru School of Dentristy, University of Sao Paulo, Sao Paulo, Brazil.
Speech-Language Pathology and Audiology Department, Federal University of Rio Grande do Norte, Natal, Brazil.
Logoped Phoniatr Vocol. 2024 Oct;49(3):96-103. doi: 10.1080/14015439.2022.2143557. Epub 2022 Nov 11.
to compare the immediate effects of low-frequency TENS employment on vocal quality in women with behavioral dysphonia before and after vocal exercises. 30 women (mean = 31.3 years old), diagnosed with behavioral dysphonia received low-frequency TENS before (TENS + VE Group) and after vocal exercises (VE + TENS Group) with a 1-week washout. They had their sustained vowel/a/and running speech recorded before and after each procedure for auditory-perceptual analysis and acoustic measures. The low-frequency TENS parameters applied were symmetrical biphasic quadratic pulse, 200 µs phase, 10 Hz frequency, intensity on the motor threshold, and the electrodes were positioned on the submandibular and superior fibers of the trapezius muscle region. The vocal exercises: tongue trill, humming, finger kazoo, and water resistance therapy were performed totalizing 20 min. intragroup analysis of sustained vowel/a/showed reduction in both groups of strain parameter and increased the breathiness; only VE + TENS Group increased the instability parameter, decreased fundamental frequency, and increased in SPI values; the running speech analysis showed an increase in the overall degree, roughness, and breathiness parameters. However, in VE + TENS Group, there was a statistically significant decrease in the intensity of the strain and an increase in breathiness. The acoustic measures showed that VE + TENS Group had a higher variation than TENS + VE Group regarding NHR. vocal exercises followed by low-frequency TENS have more immediate positive effects on voice quality than the low-frequency TENS followed by vocal exercises. This is a preliminary immediate effects study, and these effects could be verified through long-term assessments.
比较行为性发声障碍女性在接受嗓音训练前后低频经皮电神经刺激（TENS）对嗓音质量即时影响。30 名女性（平均年龄 31.3 岁），被诊断为行为性发声障碍，在接受嗓音训练（VE+TENS 组）前和后（TENS+VE 组）进行为期 1 周的洗脱期，接受低频 TENS。在每次处理前后，他们的持续元音/a/和连续言语均进行了听觉感知分析和声学测量。应用的低频 TENS 参数为对称双相二次脉冲，200µs 相位，10Hz 频率，运动阈强度，电极放置在下颌下和斜方肌区域的上纤维。嗓音训练：舌颤音、哼唱、手指卡祖笛和水抵抗疗法，总时长 20 分钟。元音/a/的组内分析显示，两组的应变参数均降低，呼吸声增加；只有 VE+TENS 组增加了不稳定性参数，降低了基频，增加了 SPI 值；连续言语分析显示总程度、粗糙度和呼吸声参数增加。然而，VE+TENS 组的应变强度显著降低，呼吸声增加。声学测量显示，VE+TENS 组的 NHR 变化高于 TENS+VE 组。嗓音训练后再进行低频 TENS 比先进行低频 TENS 后再进行嗓音训练对嗓音质量有更即时的积极影响。这是一项初步的即时效应研究，这些效应可以通过长期评估来验证。
