Location of hippocampus colored in green in the context of the surrounding structures in the coronal (a) and sagittal (b) views. Subregions of the hippocampus in (c) showing the head of the hippocampus (HH), the digitationes hippocampi (DH), the hippocampal body (HB), the hippocampal tail (HT), the terminal segment of the HT (TS), the dentate gyrus (DG), and the fields of the cornu ammonis (CA1–CA4). Adapted with permission from Springer Verlag, Heidelberg, Germany [Duvernoy (2005)].