Researchers have identified a potential biomarker of Parkinson's disease progression ... especially in the early stages. "If the disease progresses rapidly, the prognosis is worse than if it ...

the Parkinson's Progression Markers Initiative (PPMI), the PASADENA study and the SPARK study. Patients enrolled as having Parkinson's disease, prodromal (early-stage) disease, or healthy controls ...

But relatively little is known about its early stages ... the progression of the disease. "You've got to set yourself new challenges, because apathy is an ally of Parkinson's," said Ken.

According to the study, published in npj Parkinson's Disease, patients with a ... especially in the early stages. "If the disease progresses rapidly, the prognosis is worse than if it progresses ...