Spasmodic dysphonia, a neurological movement disorder, affects RFK Jr.’s vocal cords, causing difficulty in speaking and a strained voice.

Spasmodic dysphonia, like most focal dystonias, tends to emerge gradually in young adulthood or midlife (peak time of onset age 30-50 years) and then reaches a plateau, when the severity of symptoms ...

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.