A cross section of the hippocampus with some
pyramidal cells depicted with the major incoming fibres (SC - schaffer collaterals,
green), TA (temperoammonic pathway, blue), SH (septohippocampal pathway, black) Figure 3.
The gatekeeper (OLM - alpha2; red) counteract signaling coming from the TA pathway (blue), thereby allowing local inputs from the SC pathway (
green) on the
pyramidal cell (orange) to become stronger.