Spastic dysphonia is a speech impairment in which your voice sounds different as you talk. When you try to speak, the muscles in your larynx (voicebox) tighten or spasm. The vocal cords will thus be unable to vibrate correctly to produce normal sounds. A combination of treatments and therapies may help reduce the severity of the symptoms and their impact on your life and job.
Physicians and scientists are aware of the causes of spastic dysphonia. When you try to speak if you have the illness, the muscles in your larynx (voice box) can spasm open or closed. The vocal cords (folds) can move abnormally due to the rapid, involuntary spasms affecting your voice. The voice alterations are caused by spasms that come and go for no apparent reason. There is a link between stress and increased spasms.