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Although hippocampal long-term potentiation (LTP) is generally assumed to be a cellular mechanism of learning and memory, there has not been definitive evidence for this hypothesis. In the present study, therefore, we addressed the possible relationship between spatial learning ability and LTP by using rats with bilateral fimbria-fornix lesions. The animals were tested for spatial performance in spontaneous...
Memory formation is believed to alter neural circuitry at the synaptic level. Although the hippocampus is known to play an important role in spatial learning, no experimental data exist on the synaptic correlates of this process at the ultrastructural level. Here, we have employed quantitative electron microscopy in order to compare the density, size and spatial arrangement of synapses in the dentate...
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