Spasmodic Dysphonia Bulletin Board

SD vs SB
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Posted by: tidaho54 ®
08/07/2013, 09:37:53


I was told 2 1/2 years ago that I have Cervical Dystonia and
Dysphonia but was never told which type. This was done by the
first neurologist I went to. The second one really didnt address
it and I was dealing with the CD and ignoring the SD OR SB. What is the difference? Time for me to address this too along with so
many other health issues. Thank You. Teresa



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Re: SD vs SB
Re: SD vs SB -- tidaho54 Top of thread Archive
Posted by: Will Blum ®
08/08/2013, 09:45:12


There are three types of SD (Spasmodic Dysphonia) AD, AB, and Mixed.I do not know what SB is. I got this following information from this link www.en.wikipedia.org/wiki/Spasmodic_dysphonia

Spasmodic dysphonia (or laryngeal dystonia) is a voice disorder characterized by involuntary movements or spasm of one or more muscles of the larynx (vocal folds or voice box) during speech.

1. Adductor spasmodic dysphonia (ADSD), sudden involuntary muscle movements or spasms cause the vocal folds (or vocal cords) to slam together and stiffen. These spasms make it difficult for the vocal folds to vibrate and produce voice. Words are often cut off or are difficult to start because of the muscle spasms. Therefore, speech may be choppy but differs from stuttering. The voice of an individual with adductor spasmodic dysphonia is commonly described as strained or strangled and full of effort. Surprisingly, the spasms are usually absent while laughing, speaking at a high pitch, or speaking while singing, but singers can experience a loss of range or the inability to produce certain notes of a scale or with projection. Stress, however, often makes the muscle spasms more severe.

2. Abductor spasmodic dysphonia, sudden involuntary muscle movements or spasms cause the vocal folds to open. The vocal folds cannot vibrate when they are open. The open position of the vocal folds also allows air to escape from the lungs during speech. As a result, the voices of these individuals often sound weak, quiet and breathy or whispery. As with adductor spasmodic dysphonia, the spasms are often absent during activities such as laughing or singing, but singers can experience a loss of range or the inability to produce certain notes of a scale or with projection.

3. Mixed spasmodic dysphonia involves both muscles that open the vocal folds and those that close them and therefore has features of both adductor and abductor spasmodic dysphonia


Related link: Spasmodic Dysphonia

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Re: SD vs SB
Re: Re: SD vs SB -- Will Blum Top of thread Archive
Posted by: tidaho54 ®
08/16/2013, 14:57:34


Thank You for responding. Very informational. I dont get on this site very often. Have a great day.



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