Musculoskeletal Rehabilitation Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Speech Therapy, School of Rehabilitation Sciences, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
Musculoskeletal Rehabilitation Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Physiotherapy, School of Rehabilitation Sciences, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
Am J Otolaryngol. 2023 Jul-Aug;44(4):103911. doi: 10.1016/j.amjoto.2023.103911. Epub 2023 May 4.
Muscle Tension Dysphonia is a voice disorder, which results in stiffness in the laryngeal extrinsic muscles, intense collision, painful contractions, and vibrations of the vocal cords. Due to the multifactorial identity of Muscle Tension Dysphonia, its therapeutic approach must be multidisciplinary.
The participants were divided into two groups: a control group (5participants) that received Circumlaryngeal Manual Therapy (CMT) + Placebo Transcutaneous Electrical Nerve Stimulation and an experimental group (5participants) that received Transcutaneous Electrical Nerve Stimulation + CMT. Both groups received 10 sessions of treatment, twice a week, for 40 min each. Before and after treatment, participants were assessed using the Dysphonia Severity Index (DSI) and surface electromyography for their ability to sustain the vowels /e& u/and count from 20 to30.
After therapy, there were substantial improvements in the DSI (2.72 ± 0.55, P < 0.05) and muscle electrical activity in the control group. The DSI (3.66 ± 0.63, P < 0.05) and muscle electrical activity were also significantly improved in the experimental group after treatment. The findings of the between-group comparison after treatment revealed a significantly greater increase in the Dysphonia Severity Index in the experimental group compared with the control group (P = 0.037). Although there was no significant difference between the two groups in terms of muscle electrical activity, clinically significant changes were more noticeable in the experimental group when compared with the control group.
Positive results were seen in both groups. The results demonstrate that both approaches relax vocal tract muscles. As a result, Transcutaneous Electrical Nerve Stimulation was recommended as a complementary treatment for clients with Muscle Tension Dysphonia.
肌肉紧张性发声障碍是一种导致喉外肌肉僵硬、强烈碰撞、疼痛收缩和声带振动的嗓音障碍。由于肌肉紧张性发声障碍的多因素特征，其治疗方法必须是多学科的。
参与者被分为两组：对照组（5 名参与者）接受环甲膜手动疗法（CMT）+安慰剂经皮神经电刺激，实验组（5 名参与者）接受经皮神经电刺激+CMT。两组均接受 10 次治疗，每周 2 次，每次 40 分钟。在治疗前后，参与者使用发音障碍严重程度指数（DSI）和表面肌电图评估他们维持元音/e 和/u/以及从 20 数到 30 的能力。
治疗后，对照组的 DSI（2.72±0.55，P<0.05）和肌肉电活动有显著改善。实验组的 DSI（3.66±0.63，P<0.05）和肌肉电活动也有显著改善。治疗后组间比较的结果显示，实验组的发音障碍严重程度指数增加明显大于对照组（P=0.037）。尽管两组间的肌肉电活动无显著差异，但实验组的临床显著变化比对照组更明显。
两组均有阳性结果。结果表明，两种方法都能放松声道肌肉。因此，经皮神经电刺激被推荐作为肌肉紧张性发声障碍患者的补充治疗方法。
