Parkinson's new treatment tried at Frenchay Hospital
9 October 2013 Last updated at 21:37 BST
Thousands of people suffering from Parkinson's disease could benefit from a new treatment that is being tried out at Frenchay Hospital in Bristol.
Researchers hope the pioneering treatment, which involves infusing a protein directly into the brain, could help slow down the condition.
BBC West health correspondent Matthew Hill reports.