Overview
- Researchers analyzed brain-imaging datasets from 863 participants across U.S. and China cohorts, finding a Parkinson’s-specific pattern of SCAN hyperconnectivity to subcortical regions not seen in other movement disorders.
- Standard therapies including levodopa, deep brain stimulation, transcranial magnetic stimulation, and focused ultrasound were most effective when they reduced SCAN–subcortex connectivity, with larger reductions tracking with better motor outcomes.
- In a randomized comparison, SCAN-targeted transcranial magnetic stimulation produced a 56% response rate over two weeks versus 22% when stimulating adjacent cortical areas (18 patients per group).
- Experts say the results reframe Parkinson’s as a brain-network disorder that integrates movement with cognition, arousal, and internal body control rather than a purely basal ganglia motor disease.
- Causality remains unclear between dopamine neuron loss and network dysfunction, and investigators are moving to larger clinical trials and noninvasive, precision-targeted device development, including efforts by WashU-linked Turing Medical.