Some studies hypothesize that new memories could preferentially use newly formed granule cells of the dentate gyrus, providing a potential mechanism for distinguishing multiple instances of similar events or multiple visits to the same location.[34] Correspondingly, it has been proposed that the immature, newborn granule cells are receptive to form new synaptic connections with the axons arriving from the layer II of the entorhinal cortex, this way a particular new constellation of events is remembered as an episodic memory by first associating the events in the young granule cells that have the appropriate, permissive age.[35] This concept is reinforced by the fact that increased neurogenesis is associated with improved spatial memory in rodents, as seen through performance in a maze.[36]