abductor spasmodic dysphonia

abductor spasmodic dysphonia

a breathy form of spasmodic dysphonia caused by long and excessive vocal fold opening for voiceless phonemes extending into vowels.

ab·duc·tor spas·mo·dic dys·pho·ni·a

(ab-dŭk'tŏr spaz-mod'ik dis-fōn'ē-ă)
A breathy form of spasmodic dysphonia caused by excessive and long vocal cord opening for voiceless phonemes extending into vowels.
References in periodicals archive ?
The three types of spasmodic dysphonia are adductor spasmodic dysphonia, abductor spasmodic dysphonia and mixed spasmodic dysphonia.
In abductor spasmodic dysphonia, sudden involuntary muscle movements or spasms cause the vocal folds to open.
Mixed spasmodic dysphonia involves muscles that open the vocal folds as well as muscles that close the vocal folds and therefore has features of both adductor and abductor spasmodic dysphonia.
Botox may relieve the symptoms of both adductor and abductor spasmodic dysphonia.
In abductor spasmodic dysphonia, the vocal folds do not close properly due to muscle spasms that prevent the folds from vibrating to produce voice.
Assessment of posterior cricoarytenoid botulinum toxin injections in patients with abductor spasmodic dysphonia. Ann Otol Rhinol Laryngol 2001; 110:406-12.
Abductor spasmodic dysphonia. For patients with abductor spasmodic dysphonia, injections are delivered to the posterior cricoarytenoid muscle, although cricothyroid injections have also been used.
Blitzer et al studied 32 patients with abductor spasmodic dysphonia and found that after subjective pre- and postoperative evaluations by patients, physicians, and speech pathologists, the patients' percentage of normal function improved on average from 31 to 70%.
As is the case with patients who have adductor spasmodic dysphonia, results in patients with abductor spasmodic dysphonia vary, but many do obtain benefit from botulinum toxin injections.