During auditory verbal imagery, the inferior frontal cortex and the subcallosal gyrus.
2.
The "'anterior perforated substance "'is an irregularly quadrilateral area in front of the optic tract and behind the olfactory trigone, from which it is separated by the fissure prima; medially and in front, it is continuous with the subcallosal gyrus; it is bounded laterally by the lateral stria of the olfactory tract and is continued into the uncus.