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Perirhinal (PER) and Postrhinal (POR) cortex

The PER and POR are situated dorsally along the rhinal fissure. Both consist of six cell layers. The PER consist of two subdivisions, the agranular area 35 (A35) and the dysgranular area 36 (A36) or ectorhinal cortex. POR consists of a ventral agranular and dorsal (dys)granular region. The rostral border of POR with PER is difficult to discern. The ventral part of POR is quite similar to A35, but the presence of ectopic layer II cells makes it possible to discriminate the region. In the PER and POR, layer IV is variably developed.

The authors of these web pages express their gratitude to the many authors that helped provide order and overview in the field of hippocampal anatomy and connectivity. A special mention of thanks for the authors of the 1st, 2nd and 3rd edition of the hippocampus chapter in the book titles The Rat Nervous System  and The Parahippocampal Region. The authors of this website welcome feedback to improve the information that is displayed. Please use the contact form for such enquiries. These pages are currently (2013) under active development and will be frequently updated and expanded.

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