Swallowing Outcomes Following Voice Therapy in Multiple System Atrophy with Dysphagia: Comparison of Treatment Efficacy with Parkinson’s Disease

Alyssa Park, Su Jeong Jang, No Eul Kim, Tae Hui Kim, Young Ho Sohn, Hyang Hee Kim, Sung Rae Cho

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Difficulties with speech and swallowing occur in patients with Parkinsonism. Lee Silverman Voice Treatment (LSVT) is proven as an effective treatment for speech and swallowing function in idiopathic Parkinson’s disease (IPD). The effect of LSVT on swallowing function in multiple system atrophy-cerebellar type (MSA-C) is unknown. We sought to determine LSVT’s effect on swallowing function in MSA-C patients compared to IPD patients. LSVT-LOUD was performed on 13 patients with Parkinsonism (6 IPD and 7 MSA-C). Maximum phonation time (MPT), voice intensity, Speech Handicap Index-15 (SHI-15), Swallowing-Quality of Life (SWAL-QOL), National Institutes of Health-swallowing safety scale (NIH-SSS), and videofluoroscopic dysphagia scale (VDS) before and after LSVT were analyzed and reevaluated three months after treatment. The IPD and MSA-C groups showed significant improvements in overall speech and swallowing measures after LSVT. In particular, pharyngeal phase score and total score of VDS improved significantly in both groups. A two-way repeated-measure ANOVA revealed a significant main effect for time in the MPT, voice intensity, NIH-SSS, pharyngeal phase score and total score of VDS, psychosocial subdomain of SHI-15, and SWAL-QOL. The MSA-C group experienced less overall improvement in swallowing function, but the two groups had an analogous pattern of improvement. In conclusion, LSVT is effective for enhancing swallowing function, particularly in the pharyngeal phase, in both IPD and MSA-C patients. This study demonstrated that LSVT elicits significant improvements in MSA-C patients. We deemed LSVT to be an effective treatment for IPD and MSA-C patients who suffer from dysphagia.

Original languageEnglish
Pages (from-to)198-206
Number of pages9
Issue number1
Publication statusPublished - 2022 Feb

Bibliographical note

Funding Information:
This research was supported by National R&D Program through the National Foundation of Korea (NRF) funded by the Ministry of Science and ICT (2020M3C1B6113680), and by a faculty research grant of Yonsei University College of Medicine (6- 2020-0104).

Publisher Copyright:
© 2021, The Author(s).

All Science Journal Classification (ASJC) codes

  • Otorhinolaryngology
  • Gastroenterology
  • Speech and Hearing


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