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Brain Tumor Patient Control Tracts were produced that clearly replicated the cerebello-thalamo-cortical pathway that has been delineated in prior animal models (Schmahmann, 1996) for both patients and controls . Notably, the tracts cross over to the contralateral side from the cerebellar seed in the expected location of the red nucleus. From this location, the tracts then extended into the thalamus and then into the dorsolateral prefrontal cortex, which is consistent with the aforementioned feedback limb model.