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 ...

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 ...

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Robert F. Kennedy Jr.'s strained voice, due to spasmodic dysphonia (SD), has drawn ridicule and highlighted the need for greater awareness of the condition. SD, a neurological voice disorder ...

Robert F. Kennedy Jr. has a disorder called spasmodic dysphonia that makes it sound like his voice is shaking. He has said the neurological disease began to affect him when he was 42.