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arXiv 1009.2290cond-mat.dis-nnphysics.bio-phq-bio.NC
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吸引子动力学与突触抑制

Attractor Dynamics with Synaptic Depression

C. C. Alan Fung, K. Y. Michael Wong, He Wang, Si Wu

摘要:

神经元连接权重表现出短期抑制(STD)。本文研究了STD对连续吸引子神经网络(CANN)动力学的影响及其在神经信息处理中的潜在作用。我们发现,与STD网络可以产生静态和移动颠簸,STD提高了网络的性能,在跟踪外部输入。特别地,我们发现STD赋予网络缓慢衰减的平台行为,即,最初被刺激到活跃状态的网络将在STD的时间尺度上而不是在神经信号的时间尺度上非常缓慢地衰减到沉默。我们认为,这为神经系统提供了一种机制,可以轻松地保持短期记忆,并自然地关闭持续活动。

英文摘要:

Neuronal connection weights exhibit short-term depression (STD). The present study investigates the impact of STD on the dynamics of a continuous attractor neural network (CANN) and its potential roles in neural information processing. We find that the network with STD can generate both static and traveling bumps, and STD enhances the performance of the network in tracking external inputs. In particular, we find that STD endows the network with slow-decaying plateau behaviors, namely, the network being initially stimulated to an active state will decay to silence very slowly in the time scale of STD rather than that of neural signaling. We argue that this provides a mechanism for neural systems to hold short-term memory easily and shut off persistent activities naturally.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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