Figure 1.

(A) Seed regions of interest (ROI) were given on the medullary reticular formation (blue rectangle). The first target ROI was given on the midbrain tegmentum (blue rectangle) and the second target ROI on the premotor cortex (Brodmann's area 6) (blue area). RF, reticular formation; CST, corticospinal tract; STT, spinothalamic tract; ML, medial lemniscus. (B) The pathways of the corticoreticular pathway (blue color) and CST (red color) are shown at each level of the brain in a normal subject (32-year-old male) [Reprinted with permission from Yeo et al. (3)].