ArticleNPJ Parkinson's disease2026
Varying patterns of association between cortical large-scale networks and subthalamic nucleus activity in Parkinson's disease.
Article in NPJ Parkinson's disease, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The rising prevalence of Parkinson's disease has created an urgent need for brain activity markers guiding diagnosis and treatment strategies. While abnormal basal ganglia activity is known to synchronise with specific cortical regions, the temporal dynamics and cortical network architecture of this coupling remain unclear. To address this, we analysed simultaneous magnetoencephalography and subthalamic nucleus (STN) local field potential recordings from 27 individuals with Parkinson's disease, both on and off dopaminergic medication. Using a time-delay embedded Hidden Markov Model, we identified dynamic large-scale cortical networks whose occurrences fluctuate over time and exhibit distinct STN-cortical coupling. STN-supplementary motor area (SMA) synchrony increased during activations of the sensorimotor network and the posterior default mode network. The former was associated with 9.5-23 Hz power and beta bursts in the STN, and the latter with 5-16.5 Hz power. Dopaminergic medication preferentially reduced STN beta power in networks lacking enhanced STN-SMA synchrony. These findings suggest that large-scale cortical networks have varying patterns of association with STN activity and may provide temporal windows into subcortical processing. Such network signatures in non-invasive recordings offer promising candidates for markers of subcortical-cortical activity in Parkinson's disease and may provide targets for treatment strategies, including closed-loop stimulation.
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