Muscle Tension Dysphonia

Muscle Tension Dysphonia is different from spasmodic dysphonia but a person can have both conditions Muscle tension dysphonia (MTD) is a condition of extra vocal work and strain. Most of…

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Published Research

Published research on spasmodic dysphonia and related voice conditions has accelerated over the last few years This page includes links to articles, literature, research papers and studies published in various…

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Our Story

The National Spasmodic Dysphonia Association (NSDA) was established out of the desire to help people cope and thrive with spasmodic dysphonia. Since 1989, the NSDA, now Dysphonia International, has focused…

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Our Mission and Vision

New Name, Same Mission to serve our community through expanded outreach Founded in 1989, the National Spasmodic Dysphonia Association (NSDA), now Dysphonia International, is dedicated to improving the lives of…

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Dystonia and SD

Spasmodic dysphonia is a form of dystonia Spasmodic Dysphonia (SD) belongs to a family of neurological disorders called dystonias. A dystonia is a movement disorder that causes muscles to contract…

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SLAD-R Surgery

SLAD-R: A surgical option for treatment of spasmodic dysphonia The Selective Laryngeal Adductor Denervation-Reinnervation (SLAD-R) was pioneered by Dr. Gerald Berke at UCLA that focuses on the treatment of the…

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What’s Wrong with My Voice?

Finding a medical specialists can help determine what might be wrong with your voice You may have noticed something unusual happening to your voice lately. Whether these changes occur intermittently,…

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