Table 5. Tractographical approach for frontal tracts.

White matter tract	Seed mask	Waypoint and termination mask	Exclusion mask
Anterior thalamic radiation(ATR) (medial orbitofrontal cortex)	Medial orbitofrontal cortex	Eroded thalamus	All other gm regions
Anterior thalamic radiation(ATR) (rostral middle frontal cortex)	Rostral middle frontal cortex	Eroded thalamus	All other gm regions
Genu of the corpus callosum(medial orbitofrontal cortex)	Left medial orbitofrontal cortex	Right medial orbitofrontal cortex	All other cortical regions
Genu of the corpus callosum(rostral middle frontal cortex)	Left rostral middle frontal cortex	Right rostral middle frontal cortex	All other cortical regions
Anterior corona radiata (ACR)	All frontal regions	Cerebral peduncle	All other cortical regions

The Freesurfer seed, waypoint, termination, and exclusion masks used in fiber tractography to delineate examined frontal tracts. *For the tracts through the genu of the corpus callosum, a callosal waypoint mask was also used.