The anterior perforated substance is
bilateral. It lies in front of the
optic tract. It lies behind the
olfactory trigone, separated by the
fissure prima. Medially and in front, it is continuous with the
subcallosal gyrus. Its
gray substance is confluent above with that of the
corpus striatum, and is perforated anteriorly by numerous small blood vessels that supply such areas as the
internal capsule. The
anterior cerebral artery arises just below the anterior perforated substance. The
middle cerebral artery passes through its lateral two thirds.
Blood supply The anterior perforated substance is supplied by
lenticulostriate arteries, which branch from the
middle cerebral artery. It is also supplied by
anterior choroidal artery. Small branches from these create holes, which give the anterior perforated substance its name. == History ==