Short-term synaptic plasticity expands the operational range of long-term synaptic changes in neural networks
Short-term synaptic plasticity expands the operational range of long-term synaptic changes in neural networks
复制标题
短期突触可塑性扩大了神经网络长期突触变化的操作范围
DOI:
10.1016/j.neunet.2019.06.002
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发表时间:
2019-10
期刊:
影响因子:
7.8
通讯作者:
Yu Shan
中科院分区:
文献类型:
--
作者:
Zeng Guanxiong;Huang Xuhui;Jiang Tianzi;Yu Shan
The brain is highly plastic, with synaptic weights changing across a wide range of time scales, from hundreds of milliseconds to days. Changes occurring at different temporal scales are believed to serve different purposes, with long-term changes for learning and memory and short-term changes for adaptation and synaptic computation. By studying the performance of reservoir computing (RC) models in a memory task, we revealed that short-term synaptic plasticity is fundamentally important for long-term synaptic changes in neural networks. Specifically, short-term depression (STD) greatly expands the operational range of a neural network in which it can accommodate long-term synaptic changes while maintaining system performance. This is achieved by dynamically adjusting neural networks close to a critical state. The effects of STD can be further strengthened by synaptic weight heterogeneity, resulting in networks that can tolerate very large, long-term changes in synaptic weights. Our results highlight a potential mechanism used by the brain to organize plasticity at different time scales, thereby maintaining optimal information processing while allowing internal structural changes necessary for learning and memory.
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DOI:
--
发表时间:
2014-12
期刊:
--
影响因子:
--
作者:
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通讯作者:
Yuanyuan Mi;Luozheng Li;Dahui Wang;Si Wu
影响因子:
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作者:
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影响因子:
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作者:
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N. Mayer