Parkinson's patients help unlock the Brain's inner clock

This study looked at how Parkinson's disease changes a person's ability to sense time. Researchers tested 40 people—some with Parkinson's and some healthy—by measuring their eye movements as they anticipated when a target would appear. Patients were tested both on and off their regular dopamine medication to see how dopamine affects the brain's internal clock. The goal was to better understand the role of dopamine in time perception, not to provide a treatment.