Natural patterns of activity and long-term synaptic plasticity. Paulsen, O & Sejnowski, T. Curr Opin Neurobiol, 10(2):172-9, 2000. abstract bibtex Long-term potentiation (LTP) of synaptic transmission is traditionally elicited by massively synchronous, high-frequency inputs, which rarely occur naturally. Recent in vitro experiments have revealed that both LTP and long-term depression (LTD) can arise by appropriately pairing weak synaptic inputs with action potentials in the postsynaptic cell. This discovery has generated new insights into the conditions under which synaptic modification may occur in pyramidal neurons in vivo. First, it has been shown that the temporal order of the synaptic input and the postsynaptic spike within a narrow temporal window determines whether LTP or LTD is elicited, according to a temporally asymmetric Hebbian learning rule. Second, backpropagating action potentials are able to serve as a global signal for synaptic plasticity in a neuron compared with local associative interactions between synaptic inputs on dendrites. Third, a specific temporal pattern of activity–postsynaptic bursting–accompanies synaptic potentiation in adults.
@Article{Paulsen2000,
author = {O Paulsen and TJ Sejnowski},
journal = {Curr Opin Neurobiol},
title = {Natural patterns of activity and long-term synaptic plasticity.},
year = {2000},
number = {2},
pages = {172-9},
volume = {10},
abstract = {Long-term potentiation (LTP) of synaptic transmission is traditionally
elicited by massively synchronous, high-frequency inputs, which rarely
occur naturally. Recent in vitro experiments have revealed that both
LTP and long-term depression (LTD) can arise by appropriately pairing
weak synaptic inputs with action potentials in the postsynaptic cell.
This discovery has generated new insights into the conditions under
which synaptic modification may occur in pyramidal neurons in vivo.
First, it has been shown that the temporal order of the synaptic
input and the postsynaptic spike within a narrow temporal window
determines whether LTP or LTD is elicited, according to a temporally
asymmetric Hebbian learning rule. Second, backpropagating action
potentials are able to serve as a global signal for synaptic plasticity
in a neuron compared with local associative interactions between
synaptic inputs on dendrites. Third, a specific temporal pattern
of activity--postsynaptic bursting--accompanies synaptic potentiation
in adults.},
keywords = {Action Potentials, Animals, Computer Simulation, Excitatory Postsynaptic Potentials, Hippocampus, Human, Learning, Long-Term Potentiation, Neuronal Plasticity, Rats, Support, Non-U.S. Gov't, Synaptic Transmission, 10753798},
}
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