Posted in Web Spasmodic Dysphonia – Symptoms and Causes – Penn Medicine January 30, 2025 Spasmodic dysphonia, also known as laryngeal dystonia, is a neurologic disorder that can affect the voice and speech. It is a lifelong condition that causes the muscles that generate a person’s voice to go into periods of spasm. https://www.pennmedicine.org/for-patients-and-visitors/patient-information/conditions-treated-a-to-z/spasmodic-dysphonia