Fig. 1.

Illustration of the nomenclature used in this review. The top left inset shows the hippocampus of one hemisphere from which non-hippocampal tissue had been removed and illustrates the terms “septal” and “temporal”. The approximately mid-septotemporal location of the main image of a horizontal section is indicated in the top left inset by a line. The main image illustrates the terms “proximal” and “distal”. The proximal border of CA1 (more correctly CA1/2) towards CA3 and between distal CA1 and the subiculum is marked by arrowheads. The top right inset shows the pyramidal cells marked in the main image and illustrates the use of the terms “superficial” and “deep”. Scalebar 100 μm