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What are the first signs of Parkinson's disease?

The number of people living with Parkinson鈥檚 disease is set to double over the next few decades as we all live longer. It is the only long-term neurological condition that is increasing globally. Actors Michael J Fox and Alan Alda share their first experiences of coming to terms with the disease.

Illustration: Nerve cells connecting at a synapse (circled) where dopamine is being released Credit: Science Photo Library

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3 minutes