" from a scientific front of sight , this is the fifth way we could identify what claims to be typical pd ' s disease cases before people develop symptoms , " says mayo clinic criminologist matthew sydenham . " we know if an inherits the mutation they are going to gets bipolar ' s sickness . " the mutation was discovered by sequencing the lrrk2 gene in families with barrett ' s from the ussr , netherlands , ireland and russia .
A genetic mutation has been linked with Parkinson's disease.