From Microscopic to Collective Dynamics in Neural Circuits

Date

Sep 12, 2016

Time

11:00 AM - 12:00 PM

Speaker

Alessandro Torcini

Affiliation

ASG + CNR Firenze

Language

en

Main Topic

Physik

Other Topics

Physik

Host

Holger Kantz

Description

In this talk I will revise my recent results on the application of nonlinear dynamics to the study of the emergence and stability of non trivial collective behaviours in pulse-coupled neural networks of Leaky Integrate-and-Fire neurons [1-5]. In particular, I will discuss how the network dynamics depends on the the connectivity of the underlying networks [1-3] as well as on the main aspects of the synaptic transmission, like the excitatory/inhibitory nature of the synapses and the time scale of the post-synaptic potentials [4-5]. I will conclude by reporting how a simple excitatory neural network can be employed to shed some ligth on recent experimental results on the dynamical orchestration of the developing hyppocampus [6] and how a simple inhibitory network can be employed to understand some of the main features of the dynamics of the Medium Spiny Neurons in the Striatum [7] Reference [1] S. Olmi, R. Livi, A. Politi, and A. Torcini, "Collective oscillations in disordered neural network", Phys. Rev. E 81, 046119 (2010) [2] L. Tattini, S. Olmi, and A. Torcini, "Coherent periodic activity in excitatory Erdös-Reniy neural networks", Chaos 22, 023133 (2012) [3] S. Luccioli, S. Olmi, A.Politi, and A. Torcini, "Collective dynamics in sparse networks", Phys. Rev. Lett. 109, 138103 (2012) [4] S. Olmi, A.Politi, and A. Torcini, "Linear Stability in networks of pulse-coupled neurons", Frontiers in Computational neuroscience (2014) 8:8 [5] D. Angulo-Garcia and A. Torcini, "Stable chaos in fluctuation driven neural circuits", Chaos,solitons and fractals 69, 233-245 (2014) [6] S. Luccioli, E. Ben-Jacob, A. Barzilai, P. Bonifazi, and A. Torcini, "Clique of functional hubs orchestrates population bursts in developmentally regulated neural networks", PLOS Comp. Biology 10(9): e1003823 (2014) [7] D. Angulo-Garcia, J. D. Berke, A. Torcini , "Cell assembly dynamics of sparsely-connected inhibitory networks: a simple model for the collective activity of striatal projection neurons" (2015) PLOS Comp Biology

Last modified: Sep 12, 2016, 9:58:41 AM