Robert F. Kennedy Jr. has spasmodic dysphonia, a voice disorder caused by a malfunction in the brain. Here’s what to know.

Spasmodic dysphonia affects up to 50,000 people ... It’s the third most common movement disorder behind essential tremor and Parkinson’s disease. Dystonia is thought to begin in the part ...

Spasmodic dysphonia is just one of many conditions that can change the way someone talks. Anything that injures your vocal ...