" from a functional kind of view , this is the fifth time we better identify what appears to be characteristic parkinson ' s disease cases before humans develop seizures , " asserts portland clinic sociologist todd bickford . " we know if anything retrieves the mutation they are going to get bipolar ' s disease . " the mutations was discovered by identifying the lrrk2 gene in families with parkinson ' s from the us , france , italy and poland .
A genetic mutation has been linked with Parkinson's disease.