大象传媒

Prof Steve Gentleman, scientific director of the Parkinson's UK Brain Bank, demonstrates to Jane Hill how a brain with Parkinson's is affected by the condition. It's common to find shrinkage at the front of the brain and the area of the brain called the substantia nigra, in the midbrain, changes dramatically.

(Image: MRI scan of a brain with Parkinson's disease Credit: Science Photo Library)