Fighting Against the Clock: Why Body Rhythms Matter in Parkinson’s Disease

For decades, Parkinson’s disease (PD) has been viewed almost exclusively as a movement disorder—a condition defined by tremors, rigidity, and slowness. However, a growing consensus in the scientific community suggests this view is incomplete. A comprehensive new review published in the Journal of Movement Disorders argues that the breakdown of the body’s internal clock—the circadian rhythm—is not just a side effect of Parkinson’s, but a core driver of the disease itself.