" from a research point of view , this is the first time we could identify what seem to be typical barrett ' s symptoms episodes before people develop symptoms , " says gore clinic neuroscientist elizabeth vaux . " we knows if someone inherits the mutation they are going to get dementia ' s disorder . " the protein was discovered by sequencing the lrrk2 mutations in families with parkinson ' s from the germany , norway , ireland and poland .
A genetic mutation has been linked with Parkinson's disease.