Spasmodic dysphonia (SD) is a neurological disorder caused by dystonia (abnormal sustained muscle contraction) of the vocal cords, hence also referred to as “laryngeal dystonia”. Depending on the ...

Kennedy has a rare disorder called spasmodic dysphonia — a spasm of the vocal muscles. Kennedy is one of an estimated 50,000 people in North America with spasmodic dysphonia, a neurological ...

There are three different types of spasmodic dysphonia: Adductor spasmodic dysphonia: The most common type, making your voice suddenly sound strained, tight and hoarse. Abductor spasmodic ...