Fig. 9.

Schematic diagram of entorhino-dentate projections. The diagram shows the entorhinal cortex and the dentate gyrus in their dorso-ventral and septo-temporal (longitudinal) extent. The gray area indicates the level of the PHAL deposit. PHAL deposits located in the superficial layers of the dorsal entorhinal area label the “classical” entorhino-dentate projection to the outer two-thirds of the molecular layer. These fibers ascend, turn rostrally, and terminate in the septal portion of the dentate gyrus. PHAL deposits located in deeper layers of the same dorso-medial entorhinal area label entorhinal fibers to the IML, granule cell layer, and hilus in temporal portions of the dentate gyrus. These fibers terminate on proximal dendrites of granule cells, proximal dendrites of GABAergic neurons located with their cell bodies in or directly underneath the granule cell layer, and on hilar dendrites, in addition to their “normal” termination in the OML.