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What Are the Different Types of Spasmodic Dysphonia?
There are three types of spasmodic dysphonia:
Adductor spasmodic dysphonia
Characterized by sudden involuntary spasms that cause the vocal cords to slam together and stiffen. The spasms interfere with vibration of the vocal cords and production of sound is difficult. Stress can make spasms more severe. Speech sounds are strained and full of effort. Spasms do not occur when whispering, laughing, singing, speaking at a high pitch, or speaking while breathing in.
Abductor spasmodic dysphonia
Characterized by sudden involuntary spasms that cause the vocal cords to open. Vibration cannot occur when cords are open so production of sound is difficult. Also, the open position allows air to escape during speech. Speech sounds are weak, quiet, and whispery. Spasms do not occur when laughing or singing.
Mixed spasmodic dysphonia
Characterized by symptoms of both adductor and abductor spasmodic dysphonia.
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