Table I. Definitions of 29 Three-Dimensional Landmarks Collected From Each HR-MRI. Landmarks Numbers (Left Side, Right Side) Are Keyed to Figure 2.

	Landmark definition	Surface (S) or internal (I)	Bilateral (B) or midline (M)	Cerebrum (C) or cerebellum (CBM)
1, 2	Most superior and lateral point of the intersection of olfactory bulb with anterior frontal lobe	S	B	C
3, 4	Caudolateral-most point of occipital lobe	S	B	C
5	Most posterior point on interhemispheric fissure	S	M	C
6, 7	Centroid of posterior colliculus	I	B	CBM
8	Midline of cerebellar declive	S	M	CBM
9, 10	Intersection of Fissurae Intercruralis, Ansoparamediana, and Prima on cerebellar surface	S	B	CBM
11, 12	Intersection of Fissurae Prepyramidalis and Horizontalis on dorsal surface of cerebellum	S	B	CBM
13, 14	Most concave point of the intersection of Copula pyramidis with Uvula on surface of cerebellum	S	B	CBM
15	Most convex point on the midline of cerebellar Uvula	S	M	CBM
16, 17	Centroid of caudate head	I	B	C
18, 19	Centroid of thalamus	I	B	C
20, 21	Branching point of middle cerebral artery into cortical branches	S	B	C
22, 23	Origin of middle cerebral artery from Circle of Willis on ventral cerebral surface	S	B	C
24	Genu of corpus callosum at midline	I	M	C
25, 26	Centroid of septal nucleus	I	B	C
27	Anterior commissure at midline	I	M	C
28	Splenium of corpus callosum at midline	I	M	C
29	Intersection of pons with most caudal aspect of the ventral cerebral surface at midline	S	M	C

Final three columns refer to the general location and characteristics of the landmark and the analytical subset to which the landmark belongs. Landmarks were analyzed in two subsets: the cerebrum subset (C), and the cerebellum and midbrain subset (CBM). Midbrain structures were analyzed with the cerebellum subset.