![]() In addition, spasmodic dysphonia rarely extends beyond the larynx to involve the tongue and palate. With spasmodic dysphonia, vocal cord contractions are not usually rhythmic, do not appear during breathing, and may not appear during special types of voicing like singing. This is a frequent diagnostic error, likely because many physicians do not realize that essential vocal tremor can cause such dramatic voice changes. It is estimated that about 10% of people with SD also have a tremor.Ī voice tremor can easily be confused with spasmodic dysphonia. Sometimes it is during treatment of the spasmodic dysphonia symptoms when a co-existing underlying tremor is identified. A very severe tremor with significant shaking can even cause the voice to cut out, sounding similar to the voice breaks in AdSD. Typically, tremor affects muscle groups outside of the larynx and can cause the voice to sound “shaky” or “quivery.” Like adductor and abductor spasmodic dysphonia, the symptoms of vocal tremor can range from mild (infrequent, periodic tremor) to severe (affecting all voicing and singing). Some people with SD also have a tremor in their voice. ![]() A person may have a mixed form with symptoms of both AdSD and AbSD. While most people with spasmodic dysphonia fall into the two primary categories (adductor spasmodic dysphonia known as AdSD or abductor spasmodic dysphonia known as AbSD), researchers have identified several subtypes. Thyroarytenoid Myectomy or Myoneurectomy.
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