Causes of Laryngeal Dystonia
The causes of laryngeal dystonia are unknown, though the medical consensus believes it is a disorder of the central nervous system. Researchers believe that laryngeal dystonia, also called spasmodic dysphonia, may disrupt normal function in the basal ganglia of the brain. This region of the brain coordinates the movement of muscles throughout the entire body.
The voice disorder may be caused by a genetic disorder, complications following an upper respiratory infection, an injury to the larynx, extended period of heavy speaking that tired the voice and/or chronic stress. Further research is necessary to determine what risk factors may cause laryngeal dystonia.