Tags: Anatomical Structure, Brain.
Region II of hippocampus proper is a portion of the hippocampal formation.Region CA2 is a small region located between CA3 and CA1. Anatomically in the rat it is best defined as the strip of cells that receive perforant path input from EC layer II but do not receive mossy fiber connections from DG. Its pyramidal cells are more similar to those in CA3 than those in CA1 so it is grouped as a separate region.