Table 2.

Definitions of landmarks collected from MRIs. Landmarks illustrated in Fig. 2 are keyed to the landmark number

Landmark no.	Landmark definition
1, 2	Frontal pole (left, right)
3, 4	Posterior termination of the superior frontal sulcus (left, right)
5, 6	Posterior termination of the inferior frontal sulcus (left, right)
7, 8	Inferolateral termination of the central sulcus (left, right)
9, 10	Posterior termination of the Sylvian fissure (left, right)
11, 12	Occipital pole (left, right)
13, 14	Anterior horn of the lateral ventricle (left, right)
15, 16	Centroid of the head of the caudate nucleus (left, right)
17, 18	Centroid of the thalamus (left, right)
19, 20	Centroid of the amygdala (left, right)
21, 22	Posterior horn of the lateral ventricle (left, right)
23	Midline of the most superior aspect of the pons
24	Midline of the most inferior aspect of the pons
25	Midline of the genu of the corpus callosum
26	Midline of the posterior commissure
27, 28	Centroid of the superior colliculus (left, right)
29, 30	Centroid of the inferior colliculus (left, right)
31	Junction of the cerebral aqueduct and the 4th ventricle
32	Posterior-most aspect of the 4th ventricle