Diagnosis and Treatment of Spasmodic Dysphonia

Spasmodic dysphonia (SD) is a focal dystonia affecting the laryngeal muscles, causing involuntary spasms during phonation. First described over 150 years ago, SD is categorized into three types: adductor SD (strained voice due to excessive vocal fold closure), abductor SD (breathy voice due to vocal fold opening), and mixed type. Epidemiological studies in Japan estimate SD prevalence between 0.29 and 7.0 per 100,000, with a higher incidence in females and typical onset in the 30s.

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Publication Details

Journal
Practica Oto-Rhino-Laryngologica
Published
2025-01-01
DOI
https://doi.org/10.5631/jibirin.118.477
Primary Topic
Voice and Speech Disorders
Type
article
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article

Diagnosis and Treatment of Spasmodic Dysphonia

Tetsuji Sanuki
Practica Oto-Rhino-Laryngologica
Voice and Speech Disorders
article

Diagnosis and Treatment of Spasmodic Dysphonia

Tetsuji Sanuki
article en

Abstract

Spasmodic dysphonia (SD) is a focal dystonia affecting the laryngeal muscles, causing involuntary spasms during phonation. First described over 150 years ago, SD is categorized into three types: adductor SD (strained voice due to excessive vocal fold closure), abductor SD (breathy voice due to vocal fold opening), and mixed type. Epidemiological studies in Japan estimate SD prevalence between 0.29 and 7.0 per 100,000, with a higher incidence in females and typical onset in the 30s.

Practica Oto-Rhino-LaryngologicaVol. 118(7)
Nagoya City University (JP)
Good health and well-being
Openalex Percentile: Top 80%
Voice and Speech Disorders
DOISourceOpenAlex
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Diagnosis and Treatment of Spasmodic Dysphonia — Tetsuji Sanuki · Practica Oto-Rhino-Laryngologica (2025) | TGRS Research Map | TGRS