GPI and Tremor: Similarly, compared to the MedOff/StimOff state, the total non-tremor MDS UPDRS-III score as well as the rigidity, tremor, bradykinesia, and axial symptom subscores all showed significant amelioration in the MedOff/StimOn state in GPi group (p = 3.0 × 10–6, 0.029, 4.2 × 10–4, 4.0 × 10–6, and 0.001, respectively).