Spike-timing control by dendritic plateau potentials in the presence of synaptic barrages.
Spike-timing control by dendritic plateau potentials in the presence of synaptic barrages.
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DOI:
10.3389/fncom.2014.00089
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发表时间:
2014
影响因子:
3.2
通讯作者:
Anastassiou CA
中科院分区:
文献类型:
--
作者:
Shai AS;Koch C;Anastassiou CA
Apical and tuft dendrites of pyramidal neurons support regenerative electrical potentials, giving rise to long-lasting (approximately hundreds of milliseconds) and strong (~50 mV from rest) depolarizations. Such plateau events rely on clustered glutamatergic input, can be mediated by calcium or by NMDA currents, and often generate somatic depolarizations that last for the time course of the dendritic plateau event. We address the computational significance of such single-neuron processing via reduced but biophysically realistic modeling. We introduce a model based on two discrete integration zones, a somatic and a dendritic one, that communicate from the dendritic to the somatic compartment via a long plateau-conductance. We show principled differences in the way dendritic vs. somatic inhibition controls spike timing, and demonstrate how this could implement spike time control in the face of barrages of synaptic inputs.
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