The human brain presented a similar structure, with the retrocommissural hippocampus, where Ammon's horn and the dentate gyrus are folded upon themselves, in its anterior part (Fig.
11) lay next to the alveus and the fimbria of the hippocampus, the posterior part of Ammon's horn and the end of the dentate gyrus at the ventricular atrium (same Fig.
6) and, on the back side, in the fifth temporal gyrus, the retrocommissural hippocampus folded upon itself, with the structures of Ammon's horn and the dentate gyrus (sF No.