Dendritic discrimination of temporal input sequences in cortical neurons.
Dendritic discrimination of temporal input sequences in cortical neurons.
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DOI:
10.1126/science.1189664
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发表时间:
2010-09-24
期刊:
影响因子:
--
通讯作者:
Häusser M
中科院分区:
文献类型:
--
作者:
Branco T;Clark BA;Häusser M
The detection and discrimination of temporal sequences is fundamental to brain function and underlies perception, cognition, and motor output. Applying patterned two-photon glutamate uncaging we found that single dendrites of cortical pyramidal neurons exhibit sensitivity to the sequence of synaptic activation. This sensitivity is encoded both by local dendritic calcium signals and by somatic depolarization, leading to sequence-selective spike output. The mechanism involves dendritic impedance gradients and non-linear synaptic NMDA receptor activation, and is generalizable to dendrites in different neuronal types. This enables discrimination of patterns delivered to a single dendrite, as well as patterns distributed randomly across the dendritic tree. Pyramidal cell dendrites can thus act as processing compartments for detection of synaptic sequences, implementing a fundamental cortical computation.
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