Michael May

Carl Luepker was 10 years old when he first noticed his right hand twitching slightly when he played piano. It was like it had a mind of his own.

When he was 12, doctors diagnosed him with a degenerative nerve disease called dystonia. The disorder causes nerves in the brain to misfire, causing uncontrolled muscle spasms that get worse over time.

Editor's note: This story contains some explicit language.