Strong CA2 pyramidal neuron synapses define a powerful disynaptic cortico-hippocampal loop.
Strong CA2 pyramidal neuron synapses define a powerful disynaptic cortico-hippocampal loop.
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DOI:
10.1016/j.neuron.2010.04.013
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发表时间:
2010-05-27
期刊:
影响因子:
16.2
通讯作者:
Siegelbaum SA
中科院分区:
文献类型:
--
作者:
Chevaleyre V;Siegelbaum SA
Neurons propagate information through circuits by integrating thousands of synaptic inputs to generate an action potential output. Inputs from different origins are often targeted to distinct regions of a neuron’s dendritic tree, with synapses on more distal dendrites normally having a weaker influence on cellular output compared to synapses on more proximal dendrites. Here we report that hippocampal CA2 pyramidal neurons, whose function has remained obscure for 75 years, have a reversed synaptic strength rule. Thus, CA2 neurons are strongly excited by their distal dendritic inputs from entorhinal cortex but only weakly activated by their more proximal dendritic inputs from hippocampal CA3 neurons. CA2 neurons in turn make strong excitatory synaptic contacts with CA1 neurons. In this manner CA2 neurons form the nexus of a highly plastic disynaptic circuit linking the cortical input to the hippocampus to its CA1 neuronal ouput. This circuit is likely to mediate key aspects of hippocampal-dependent spatial memory.
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影响因子:
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作者:
Nakashiba, Toshiaki;Young, Jennie Z.;Tonegawa, Susumu
通讯作者:
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DOI:
10.1073/pnas.93.10.4760
发表时间:
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10.1073/pnas.0706919104
发表时间:
2007-09-11
影响因子:
11.1
作者:
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通讯作者:
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