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FIGURE 3. (A) Brain areas show significant rCBF increase from postoperative on-stimulation condition at 5 mo to postoperative on-stimulation condition at 42-mo follow-up. Results are displayed as SPM projections in 3 orthogonal views (P < 0.0001, uncorrected). MI = primary motor cortex; pre-SMA = rostral part of supplementary motor area; SI: primary sensory cortex; Gpe = globus pallidus pars externa; SN = substantia nigra. (B) rCBF increases in pre-SMA and SN were superimposed on normalized T1-weighted MR images to increase clarity.