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Axial sections depicting masks of pallidal segments (A) and pedunculopontine nucleus (B) superimposed on the International Consortium for Brain Mapping (ICBM) template. Masks were labeled according to the subsequent color code: external globus pallidus (GPe) (blue), internal globus pallidus (GPi) (red), pedunculopontine nucleus (PPN) (yellow). Images are shown according to radiological convention.
