Spasmodic dysphonia

A benign neurological voice disorder caused by laryngeal dystonia. Abductory SD interferes with smooth flow of the voice by choking off the sound of the voice. During running speech, abductory SD, by contrast, causes the voice to momentarily drop off to a whisper. Also called intermittent whisper phonation. Comprises about 10% of cases of spasmodic dysphonia.

Posted in Glossary.

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