Kennedy Jr.'s voice. Spasmodic dysphonia is a chronic neurological voice disorder and a focal laryngeal dystonia. It results in involuntary spasms of the muscles that open or close the vocal folds ...
Spasmodic dysphonia (SD) is a rare disorder that causes involuntary movements of the voice box, says Saul Frankford, an assistant professor in the School of Behavioral and Brain Sciences at the ...
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