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Dysphonia - spasmodic
Spasmodic dysphonia is difficulty speaking due to spasms (dystonia) of the muscles that control the vocal cords.
In the past, spasmodic dysphonia was thought to be caused by a psychological, instead of a physical problem. However, many people now believe that it stems from a problem in the brain and nervous system. The vocal cord muscles spasm, causing the vocal cords to get too close or too far apart while people with the condition are using their voice.
Spasmodic dysphonia usually occurs between ages 30 and 51. Women are more likely to be affected than men.
Goetz CG, ed. Textbook of Clinical Neurology. 3rd ed. Philadelphia, PA: Saunders Elsevier; 2007:chap 13.
Blitzer A, Alexander RE, Grant NN. Neurologic disorders of the larynx. In: Cummings CW, Flint PW, Haughey BH, et al, eds. Otolaryngology: Head & Neck Surgery. 5th ed. Philadelphia, Pa: Mosby Elsevier;2010:chap 60.
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