Toward a Neurocentric View of Learning.

Toward a Neurocentric View of Learning.
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DOI:
10.1016/j.neuron.2017.05.021
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发表时间:
2017-07-05
期刊:
影响因子:
16.2
通讯作者:
Hansel C
Hansel C
中科院分区:
医学1区
文献类型:
--
作者:
Titley HK;Brunel N;Hansel C

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突触可塑性(如长期增强;LTP)被认为是学习的细胞相关性。最近关于记忆印痕形成的光遗传学研究认为,神经元的阈上激活及其整合到活动印痕(“印痕细胞”)中在学习中起着关键作用。在这里,我们回顾了系综整合可能由LTP引起的证据,但也可能由细胞膜兴奋性的细胞自主变化引起。我们认为突触可塑性决定了突触连接图,而内在可塑性(可能随时间分离)放大了神经元的反应性,并强烈地推动了印痕整合。我们的建议标志着学习的观点从排他性的突触中心转向非排他性的神经中心。
Synaptic plasticity (e.g. long-term potentiation; LTP) is considered as the cellular correlate of learning. Recent optogenetic studies on memory engram formation assign a critical role in learning to suprathreshold activation of neurons and their integration into active engrams (‘engram cells’). Here we review evidence that ensemble integration may result from LTP, but also from cell-autonomous changes in membrane excitability. We propose that synaptic plasticity determines synaptic connectivity maps, while intrinsic plasticity – possibly separated in time – amplifies neuronal responsiveness and acutely drives engram integration. Our proposal marks a move away from an exclusively synaptocentric toward a non-exclusive, neurocentric view of learning.
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