Glossary Oromandibular dystonia – This is a type of dystonia in which the jaw muscles are affected with involuntary contractions. Spasmodic dystonia – This is a type of dystonia in which the muscles of the larynx are affected, impairing speech abilities. Encephalitis – Encephalitis is a serious condition in which there is inflammation of the brain.Epilepsy – This is a chronic and neurological disorder in which the individual experiences recurrent seizures. Published on Apr 20, 2015Last Updated on May 29, 2018