Munson Health
Spasmodic Dysphonia

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by Cresse M

(SD; Adductor Laryngeal Breathing Dystonia (ABLD); Adductor Spasmodic Dysphonia; Abductor Spasmodic Dysphonia; Dysphonia, Episodic Laryngeal Dyskinesia; Laryngeal Dystonia; Spastic Dysphonia)


Risk Factors

Factors that may increase your chance of developing SD include:


You will be asked about your symptoms and medical history. A physical exam will be done.
Images may be taken of your bodily structures. This can be done with:
You may be referred to a team of specialists, including:
  • Neurologist—to evaluate your brain function
  • Speech pathologist—to evaluate your speech and how it’s produced
  • Otolaryngologist—to evaluate your vocal cords


American Speech-Language-Hearing Association

National Spasmodic Dysphonia Association



Ontario Association for Speech-Language Pathologists and Audiologists

Speech-Language & Audiology Canada



Daniilidou, P, Carding P, Wilson, J, Drinnan, M, Deary, V. Cognitive behavioral therapy for functional dysphonia. Annals of Otology, Rhinology & Laryngology. 2007;116:717-722.

Diagnosis. National Spasmodic Dysphonia Association website. Available at: Accessed February 17, 2014.

Rosow DE, Parikh P, et al. Considerations for initial dosing of botulinum toxin in treatment of adductor spasmodic dysphonia. Otolaryngol Head Neck Surg. 2013; 148(6):1003-6.

Spasmodic dysphonia. American Speech-Language-Hearing Association website. Available at: Accessed February 17, 2014.

Spasmodic dysphonia. National Institute on Deafness and Other Communicative Disorders website. Available at: Updated October 2010. Accessed February 17, 2014.


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