How is the disease that Michael J. Fox has?, Dr. Elmer Huerta explains the symptoms 7:33

(CNN) — Actor Michael J. Fox was participating in a panel discussion on "Back to the future" on Sunday when he suffered a fall.

Fox was at the Pennsylvania Convention Center in Philadelphia for a question-and-answer session about the film. When he was introduced and bowed he lost his balance, falling and crashing into a sofa.

Fox was diagnosed with Parkinson's disease at age 29, in 1991. This disease can affect balance.

His co-stars Christopher Lloyd and Tom Wilson were also on stage.

  • What is Parkinson's disease?

Fox recently stated that his battle with Parkinson's has become more difficult. "I'm not going to turn 80," he told "CBS Sunday Morning."

He added: "I'm not going to lie. It's getting hard, it's getting very hard. Every day is more difficult. It's harder every day."


In 2000, the Family Ties alumnus created the Michael J. Fox Foundation for Parkinson's Research, which has raised more than $1 billion in funding.

His documentary, "Still: A Michael J. Fox Movie," is available on Apple TV+.

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