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arXiv 1711.08032q-bio.NC
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连续吸引子网络的有效低维逼近

Efficient low-dimensional approximation of continuous attractor networks

Alexander Seeholzer, Moritz Deger, Wulfram Gerstner

摘要:

连续“碰撞”吸引子是连续变量的皮层工作记忆的已建立模型,并且可以使用各种神经元和网络模型来实现。在这里,我们开发了一种可推广的方法,用于在基于速率和尖峰神经元的网络中实现的连续吸引子网络的凸点状态的近似。该方法依赖于一个低维参数化的空间形状的射击率,允许应用有效的数值优化方法。使用我们的理论,我们可以建立网络结构和吸引子属性之间的映射,该映射允许预测网络参数对稳态发射率曲线和凸块的存在的影响,反之亦然,以微调网络以产生给定形状的凸块。

英文摘要:

Continuous "bump" attractors are an established model of cortical working memory for continuous variables and can be implemented using various neuron and network models. Here, we develop a generalizable approach for the approximation of bump states of continuous attractor networks implemented in networks of both rate-based and spiking neurons. The method relies on a low-dimensional parametrization of the spatial shape of firing rates, allowing to apply efficient numerical optimization methods. Using our theory, we can establish a mapping between network structure and attractor properties that allows the prediction of the effects of network parameters on the steady state firing rate profile and the existence of bumps, and vice-versa, to fine-tune a network to produce bumps of a given shape.

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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