en مقاله کامل Full Length/Original Article The effect of endogenous serotonin on long-term potentiation (LTP) in region CAI was studied by blocking 5-HT2 receptors with ketanserin in rat hippocampal slices. Such a block significantly en-hanced long-term potentiation of the CAI population spike induced by high frequency stimulation of the schaffer collateral/ commissural pathway. This implies that serotonin acts on 5-HT2 receptors in CAI to repress long-term potentiation. Long-term potentiation , Synaptic plasticity , Serotonin , Hippocampus 129 131 http://ibj.pasteur.ac.ir/browse.php?a_code=A-10-1-433&slc_lang=en&sid=1 Nasser Naghdi ناصر نقدی Yes Neveill Goodwin Susan Pocket No Susan Pocket Neveill Goodwin No