While basal ganglia dysfunction has traditionally been viewed as the primary driver of Parkinson's disease motor symptoms, modern neuroscience increasingly points to a distributed network model involving structures like the cerebellum and wider cortical loops.
The evidence we hold leans leans supported
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The claim attributes Parkinson's tremors strictly to basal ganglia dysfunction affecting motor circuits. Several sources support the primary role of the basal ganglia and its oscillatory abnormalities in Parkinsonian motor symptoms (Papers 0, 3, 6, 7, 8). However, recent literature indicates that this view is incomplete, showing active involvement of the cerebellum and broader large-scale networks in generating parkinsonian motor features (Papers 9, 10). Because the literature disputes whether the basal ganglia alone are responsible or whether other systems like the cerebellum are crucially involved, the verdict is CONTESTED.