A recently discovered brain network may be the core circuit underlying symptoms of Parkinson's disease. The network is called the somato-cognitive action network (SCAN), and it was first outlined in 2023 and thought to be relevant for movement disorders. Now, just a few years later, researchers have analyzed brain scans of more than 850 people and found that those with Parkinson's disease show hyperconnectivity between the SCAN circuit and other parts of the brain. The fingers of this network