a groove which runs upward alongside the medial side of each cerebral hemisphere, continuing from a junction with the calcarine fissure at a place behind the splenium, and making up the border between the precuneus and cuneus areas.
a groove which runs upward alongside the medial side of each cerebral hemisphere, continuing from a junction with the calcarine fissure at a place behind the splenium, and making up the border between the precuneus and cuneus areas.