Prevalence
Spasmodic dysphonia is a relatively rare condition, with an estimated prevalence of approximately one to four cases per 100,000 individuals. The onset of symptoms typically occurs between the ages of 30 and 50. While the condition can affect anyone, it appears to be more common among women than men.
Adductor Spasmodic Dysphonia
Adductor spasmodic dysphonia is the most prevalent type of this condition. It is characterized by spasms that tighten the vocal cords, causing them to collide with each other. As a result, individuals with this condition often struggle to produce vocal sounds, and their voice may sound strained. They may experience interruptions or difficulties in initiating words. Interestingly, when affected individuals laugh, cry, or shout, the spasms usually cease, allowing their voice to sound normal. Stress has been found to exacerbate this type of spasmodic dysphonia, making it more severe.