Among the brainstem regions (midbrain, pons, medulla, and LC), we found a significant difference only for the midbrain's first ring median R1 between the HC and PD groups ( P = 0.046), and that relationship was only marginally significant.
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Among the brainstem regions (midbrain, pons, medulla, and LC), we found a significant difference only for the midbrain's first ring median R1 between the HC and PD groups ( P = 0.046), and that relationship was only marginally significant.