Research Funding

APPLY FOR RESEARCH GRANT Seed grants help nurture and support research while expanding our understanding of spasmodic dysphonia (SD) and related voice conditions. With these grants, we help investigators gather…

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Participate in Research

Opportunities to participate in research to find answers for voice disorders Researchers need you! By participating in clinical research trials you are helping us to learn more about the cause…

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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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Diagnosing Spasmodic Dysphonia

Diagnosing Spasmodic Dysphonia Spasmodic dysphonia (SD) can be difficult to diagnose because the anatomy of the larynx remains normal. SD has no objective pathology that is evident through x-rays or…

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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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Botulinum Neurotoxin Injections

Botulinum neurotoxin injections to treat symptoms of spasmodic dysphonia Botulinum neurotoxin (BNT) is a common treatment used to reduce the symptoms of spasmodic dysphonia since the mid-1980s. Botulinum toxin is…

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Spasmodic Dysphonia

About Spasmodic Dysphonia If your tight, strangled, broken, whispery, or otherwise “not quite right” voice has been diagnosed as spasmodic dysphonia (SD), this website will provide a wealth of information…

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Privacy Policy

Dysphonia International deeply respects the privacy of its visitors Dysphonia International (DI), formerly the National Spasmodic Dysphonia Association (NSDA) created this statement to demonstrate our firm commitment to privacy. The…

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