Table 1.

Definitions of ROIs drawn manually to delineate WM tracts

Tract	Inclusion ROI 1	Inclusion ROI 2	Exclusion ROI
UF	Entire temporal lobe identified in coronal plane at level where frontal and temporal lobe are no longer connected	All projections into frontal lobe	Fibers which project into anterior limb of external capsule and posteriorly
IFOF	Occipital lobe selected in coronal plane identified halfway between posterior edge of cingulum and posterior of the brain	Entire hemisphere in coronal plane at level of the genu of CC identified in mid-sagittal slice	Fibers crossing medially through anterior commissure
ILF	Entire hemisphere selected in coronal plane at posterior edge of cingulum identified at mid-sagittal slice	Entire temporal lobe identified in the coronal plane at level where frontal and temporal lobe are no longer connected	Fibers that track medially into fornix and CC
SLF	Identified in coronal plane at lowest axial level in which fornix can be identified as a single structure	Projections passing through coronal plane at level of splenium of CC identified in mid-sagittal slice	Fiber that project into external capsule

UF, uncinate fasciculus; IFOF, inferior fronto-occipital fasciculus; ILF, inferior longitudinal fasciculus; SLF, superior longitudinal fasciculus; CC, corpus callosum.