期刊
LEARNING & MEMORY
卷 16, 期 7, 页码 413-416出版社
COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
DOI: 10.1101/lm.1430809
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Olfactory-discrimination learning results with a series of intrinsic and excitatory synaptic modifications in piriform cortex pyramidal neurons. Here we show that such learning results with long-lasting enhancement of inhibitory synaptic transmission onto proximal dendrites of these pyramidal neurons. Such enhancement is mediated by a strong hyperpolarizing shift in the reversal potential of fast inhibitory postsynaptic potentials (fIPSPs). Moreover, paired-pulse depression of these IPSPs, indicating enhanced GABA release, is also apparent after learning. We suggest that learning is accompanied by long-lasting enhancement of synaptic inhibition onto excitatory neurons, thus compensating for the increase of excitation in these neurons.
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