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Central nervous system
Central nervous system


Definition:

Spasmodic dysphonia involves difficulty speaking because of repetitive or continuous spasms (dystonia) of the muscles that control the vocal cords.



Alternative Names:

Dysphonia - spasmodic



Causes, incidence, and risk factors:



Symptoms:

The excessive activity of the vocal cord muscles drives the vocal cords either too close or too far apart.

This causes a hoarse or grating sounding voice, often with pauses (known as adductor dysphonia) or a whispery, breathy voice (abductor dysphonia), which is less common.



Signs and tests:



Treatment:

Some people will find that the problem goes away when they sing or shout. Botulinum toxin (Botox) treatments may help.



Support Groups:



Expectations (prognosis):



Complications:



Calling your health care provider:



Prevention:



References:

Goetz CG, ed. Textbook of Clinical Neurology. 3rd ed. Philadelphia, PA: Saunders Elsevier; 2007:chap 13.




Review Date: 6/19/2008
Reviewed By: Sean O. Stitham, MD, private practice in Internal Medicine, Seattle, WA; Daniel B. Hoch, PhD, MD, Assistant Professor of Neurology, Harvard Medical School, Department of Neurology, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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