Parkinson's symptoms trace to distinct brain circuits

MedicalXpress | mai 26, 2026

Parkinson's disease is often treated as a single disorder. But for the more than 1.1 million people living with it in the United States, the disease can look different from one person to the next. Research from Carnegie Mellon University's Aryn Gittis and colleagues suggests the most recognizable symptoms—tremor and slowed movement—result from disruptions in different motor circuits of the brain, an insight that could help explain why current treatments don't work equally for all patients.