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Brain & Nervous System Health Center

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Spasmodic Dysphonia

It is possible that the main title of the report Spasmodic Dysphonia is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.


  • CSD (Chronic Spasmodic Dysphonia)
  • Laryngeal Dystonia
  • Dysphonia Spastica
  • Spastic Dysphonia
  • SD

Disorder Subdivisions

  • Abductor Spasmodic Dysphonia
  • Adductor Spasmodic Dysphonia

General Discussion

Spasmodic dysphonia is a voice disorder characterized by momentary periods of uncontrolled vocal spasms, tightness in the throat, and/or recurrent hoarseness. At certain times, affected individuals must make a conscious effort to speak. The most frequent sign of this disorder is a sudden, momentary lapse or interruption of the voice. Spasmodic dysphonia is a form of dystonia, a group of neurological movement disorders characterized by involuntary muscle spasms.

There are two types of spasmodic dysphonia: Abductor spasmodic dysphonia and the more common adductor spasmodic dysphonia. The cause of spasmodic dysphonia is not known.


WE MOVE (Worldwide Education and Awareness for Movement Disorders)
5731 Mosholu Avenue
Bronx, NY 10471
Tel: (347)843-6132
Fax: (718)601-5112

National Spasmodic Dysphonia Association
300 Park Boulevard
Suite 415
Itasca, IL 60143
Fax: (630)250-4505
Tel: (800)795-6732

Dystonia Medical Research Foundation
1 East Wacker Drive, Suite 2810 East Wacker Drive
Suite 2810
Chicago, IL 60601-1905
United States
Tel: (312)755-0198
Fax: (312)803-0138
Tel: (800)377-3978

NIH/National Institute on Deafness and Other Communication Disorders
31 Center Drive, MSC 2320
Communication Avenue
Bethesda, MD 20892-3456
Tel: (301)402-0900
Fax: (301)907-8830
Tel: (800)241-1044
TDD: (800)241-1105

Dystonia Society
89 Albert Embankment, 2nd Floor
London, SE1 7TP
United Kingdom
Tel: 08454586211
Fax: 08454586311
Tel: 08454586322

Genetic and Rare Diseases (GARD) Information Center
PO Box 8126
Gaithersburg, MD 20898-8126
Tel: (301)251-4925
Fax: (301)251-4911
Tel: (888)205-2311
TDD: (888)205-3223

American Dystonia Society
17 Suffolk Lane
Suite 1
Princeton Junction, NJ 08550
Tel: (310)237-5478
Fax: (609)275-5663

For a Complete Report:

This is an abstract of a report from the National Organization for Rare Disorders (NORD). A copy of the complete report can be downloaded free from the NORD website for registered users. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational therapies (if available), and references from medical literature. For a full-text version of this topic, go to and click on Rare Disease Database under "Rare Disease Information".

The information provided in this report is not intended for diagnostic purposes. It is provided for informational purposes only. NORD recommends that affected individuals seek the advice or counsel of their own personal physicians.

It is possible that the title of this topic is not the name you selected. Please check the Synonyms listing to find the alternate name(s) and Disorder Subdivision(s) covered by this report

This disease entry is based upon medical information available through the date at the end of the topic. Since NORD's resources are limited, it is not possible to keep every entry in the Rare Disease Database completely current and accurate. Please check with the agencies listed in the Resources section for the most current information about this disorder.

For additional information and assistance about rare disorders, please contact the National Organization for Rare Disorders at P.O. Box 1968, Danbury, CT 06813-1968; phone (203) 744-0100; web site or email

Last Updated: 4/26/2008
Copyright 1987, 1988, 1990, 1991, 1996, 2002 National Organization for Rare Disorders, Inc.

WebMD Medical Reference from the National Organization for Rare Disorders

Last Updated: May 28, 2015
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

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