[citation needed] Medially and in front, it is continuous with the subcallosal gyrus.

[2] 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.

[3] The middle cerebral artery passes through its lateral two thirds.

[4] Small branches from these create holes, which give the anterior perforated substance its name.

[1] The anterior perforated substance is named after the holes created by small blood vessels that supply it.