Fig 1.

Parasagittal and coronal T2-weighted MR images of the postmortem human brain stem. A, Canonical axial brain stem levels parallel to the anterior/posterior commissure plane that are found in Fig 2 are represented with the solid lines and On-line Fig 1 with the dashed line. Only selected brain stem substructures are labeled in coaligned sagittal and coronal images to orient the reader relative to the craniocaudal axial slice positions. The On-line Table provides a complete list of labeled anatomy for all figures, indicated by the numbers in parentheses in the legends. Note the trochlear nerve (asterisk, C) only seen in some brains.