Cells of origin of entorhinal cortical afferents to the hippocampus and fascia dentata of the rat

The pathway from the entorhinal cortical region to the hippocampal formation has previously been shown to be comprised of two sub‐systems, one of which projects predominantly to the ipsilateral fascia dentata and regio inferior of the hippocampus proper, and a second which projects bilaterally to regio superior. The goal of the present investigation was to determine if these two pathways might originate from different cell populations within the entorhinal area. The cells of origin of these entorhinal pathways were identified by retrograde labeling with horseradish peroxidase (HRP).

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