arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1407.2297q-bio.NCcond-mat.dis-nnmath.PRnlin.CD
收藏

具有特定连通性的随机网络的混沌过渡

Transition to chaos in random networks with cell-type-specific connectivity

Johnatan Aljadeff, Merav Stern, Tatyana O. Sharpee

摘要:

在神经回路中,统计连接规则强烈依赖于神经元类型。在这里,我们研究了神经网络与细胞类型的特定连接的动力学通过扩展的动态平均场方法,并发现这些网络表现出一个阶段之间的转变沉默和混沌活动。通过分析这种转移的轨迹,我们得到了随机矩阵理论中的一个新结果:具有块结构方差的随机连通矩阵的谱半径。我们应用我们的结果来展示网络中的一小群超兴奋神经元如何显着增加网络的计算能力。

英文摘要:

In neural circuits, statistical connectivity rules strongly depend on neuronal type. Here we study dynamics of neural networks with cell-type specific connectivity by extending the dynamic mean field method, and find that these networks exhibit a phase transition between silent and chaotic activity. By analyzing the locus of this transition, we derive a new result in random matrix theory: the spectral radius of a random connectivity matrix with block-structured variances. We apply our results to show how a small group of hyper-excitable neurons within the network can significantly increase the network's computational capacity.

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。

↑