Effects of Laryngeal Massage on Muscle Tension Dysphonia: A Systematic Review and Meta-Analysis

Abstract

Background and Objectives This study was to investigate the voice quality and articulation effects of laryngeal massage on muscle tension dysphonia (MTD).Materials and Method A systematic review of articles published between January 2000 and December 2020 in Cochrane, PubMed, ScienceDirect, SpingerLink, ERIC, and Naver Academic was conducted. From the total of 2094 articles identified, 10 peer-reviewed articles were included in a meta-analysis. Mean effect sizes of the variables related to voice quality (jitter, shimmer, harmonic to noise ratio or noise to harmonic ratio, high-F0, low-I, cepstral peak prominence) and articulation (F1, F2, F1 slope, F2 slope) were calculated by Hedges’g.Results Meta-analysis of the selected articles showed that laryngeal massage had medium to large effects on all variables of voice quality and articulation except F0-high and F1 slope in the MTD patients.Conclusion This study provided comprehensive clinical evidence that it is highly desirable to apply laryngeal massage to MTD patients.

The Efficacy of the Manual Circumlaryngeal Therapy for Muscle Tension Dysphonia: A Systematic Review and Meta‐analysis

“…To evaluate the efficacy of treatment approaches of muscle tension dysphonia, the present study and previous meta‐analysis by Kim 37 provide evidence that MCT is an effective treatment option. In this context, three additional meta‐analyses identified six voice therapy programs that demonstrated significant voice improvements in the treatment of dysphonia associated with muscle tension dysphonia based on statistical network analyses.…”

“…37 Although MCT was the most frequent therapy approach in this study (75%), two other manual treatment approaches were included as well. 37 The treatment effect was evaluated with g-Hedge's without considering interstudy differences of data processing methodology from acoustics. 37 These differences of data processing include bias because acoustic measures will vary based on the various acoustic software platforms utilized, such as Multi Dimensional Voice Program, Praat, TF32, Dr.…”

“…Previous meta-analyses of manual voice therapies have attempted to confirm intersections of the various manual approaches with different primary outcome variables. 36,37 Ribeiro et al 36 included in their meta-analysis the laryngeal manual therapy approach of two randomized control trial studies evaluating the perceived overall severity of vocal deviation and the intensity of vocal and laryngeal symptoms. The treatment effect of laryngeal manual therapy from this meta-analysis revealed no differences from transcutaneous electrical nerve stimulation and vocal training composed of the tongue or lip trill, humming, overarticulation, and chewing techniques.…”

“…Previous meta‐analyses of manual voice therapies have attempted to confirm intersections of the various manual approaches with different primary outcome variables 36,37 . Ribeiro et al 36 included in their meta‐analysis the laryngeal manual therapy approach of two randomized control trial studies evaluating the perceived overall severity of vocal deviation and the intensity of vocal and laryngeal symptoms.…”

Efficacy of Laryngeal Massage in Patients with Muscle Tension Dysphonia: Changes in Surface Electromyography (sEMG) Activity

“…LMT 기법을 조합하여 후두마사지를 반폐쇄성도운동과 함께 실시 한 결과 음질이 향상되었으며 (Kim, Lee, Choi, & Choi, 2017), 후두 마사지는 후두의 위치를 낮추고 성도의 길이를 늘어나게 하여 조음 향상에도 도움을 준다고 보고하였다 (Aghadoost, Jalaie, Khatoonabadi, Dabirmoghaddam, & Khoddami, 2020;Kim, 2021) (Kim, 2021).…”