A benign neurological voice disorder caused by laryngeal [intlink id=”148″ type=”post”]dystonia[/intlink]. Abductory SD interferes with smooth flow of the voice as follows: During running speech, the voice intermittently drops out to a whisper. AB-SD is also called intermittent whisper phonation, and comprises about 10% of all cases of [intlink id=”512″ type=”post”]spasmodic dysphonia[/intlink]. See also [intlink id=”575″ type=”post”]tonic variant spasmodic dysphonia[/intlink].
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