Figure 5.

Images of the rostral part of the medulla oblongata. R₁, $R_{\mathrm{2}}^{\mathrm{*}}$, and susceptibility maps as well as direction-encoded track-density (same color-encoding as in Figure 1; slightly distorted compared to the other axial image contrasts) and T₂-weighted images of the same region are presented in axial orientation from (A–E), respectively. The sectional plane of the axial images is indicated by the dashed line overlaid on the sagittal R₁ map shown in (F). Axial histological sections from a different subject stained for myelin and cells are illustrated in (G) and (H), respectively. The arrows indicate: (a) pyramid, (b) inferior olive, (c) spinal trigeminal nucleus, (d) inferior cerebellar peduncle, (e) medial longitudinal fasciculus, (f) medial lemniscus, (h) reticular formation, (i) accessory cuneate nucleus, (j) solitary nucleus, (k) dorsal motor nucleus of the vagus nerve, and (l) hypoglossal nucleus. [The histological stains (G,H) were adapted with permission from http://www.brains.rad.msu.edu and http://brainmuseum.org, supported by the US National Science Foundation.]