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25 reviewsABSTRACTKeywords:Background: Subthalamic nucleus (STN) deep brain stimulation (DBS) is used to treat Parkinson’s disease (PD), Deep brain stimulationyet neither high-frequency stimulation (HFS) nor low frequency stimulation (LFS) fully resolves gait issues. Parkinson’s diseasePrevious studies indicate that STN-DBS modulates motor-related brain networks. Given that PD patients with gait Frequencydisturbances exhibit cognitive deficits—and considering the extensive projections between the STN and cerebral Gaitcortex—we hypothesized that varying STN stimulation frequencies may improve gait by modulating distinct Multi-networkbrain networks.Functional connectivityMethods: We collected gait data, cortical electrophysiological signals, and resting-state fMRI from 44 PD patients and 32 healthy controls. Multi-network cortical activity and functional connectivity were c ompared under three conditions: DBS OFF, HFS, and LFS. Additionally, the connectivity values were correlated to the gait behaviors and clinical assessment scores.Results: We found that: (1) HFS improved both motor and gait performance, while LFS enhanced gait but may not be optimal for long-term use; (2) STN-DBS induced widespread modulation across sensorimotor, frontoparietal, salience, dorsal attention, and default mode networks. HFS improved motor and gait functions via network modulation related to motor control, whereas LFS may enhance gait by boosting executive-related cortical activities and connections; (3) Relative to healthy controls, PD exhibited widespread reductions in functional connectivity, with DBS modulation trending toward normalization.Conclusions: These results reveal distinct brain network responses to different STN-DBS frequencies in PD, offering a theoretical basis for optimizing DBS treatment for gait impairments. These findings provide critical insights for tailoring DBS parameters to maximize both motor and
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