Talk by Prof. Ludovico Minati

Event Date: 
Fri, 02/10/2015 - 16:30

CBC Seminars

 

 

Ludovico Minati, from Center for Mind/Brain Science, University of Trento (Italy), invited by Gustavo Deco (CNS Group)

 

Title: Could networked electronic chaotic oscillators be a useful analogy of collective brain dynamics?

 

Abstract: An emerging approach to brain complexity is jointly investigating the micro-, meso- and macro-scales attempting to discover scale-invariant features. Within this framework, here we shall consider the potential relevance of experimental networks of chaotic electronic oscillators as a putative model (or analogy) of some emergent aspects of brain dynamics. This approach appears well-suited to micro-scale investigation, wherein observation and manipulation of networks comprising few tens or hundreds of nodes is of interest, and may complement numerical simulation. Some recently-discovered single-transistor oscillator circuits which can generate strikingly complex activity in spite of their topological simplicity will be presented, and it will be shown that cluster synchronization leads to the formation of communities on an experimental ring of diffusively-coupled units. A provocative analogy between this setup and phenomena observed from resting-state functional MRI data will then be discussed, whereby in both contexts, despite profound differences in scale and dynamics, non-linear structure and low-frequency fluctuations selectively appear for “hub” network nodes. A related CMOS circuit suitable for implementing very large-scale neuromorphic networks in silicon will then be introduced. Finally, recent experimental evidence of spontaneous emergence of remote and lag synchronization of amplitude fluctuations in a ring of reconfigurable analog oscillators will be shown, with a discussion of potential implications for understanding and modelling the mismatch between structural and functional brain connectivity.

Papers:
 
 
 
When (non-standard hour!):
 

Thursday, October 2nd, at 16:30

Where:

Campus de la Comunicacio UPF, C/ Roc Boronat, 132. MAP
Edifici 52 (Ed. Roc Boronat), room 52.S25

Universitat Pompeu Fabra.

 

How to get there:

Metro: Llacuna or Poblenou <L4>, Glories <L1>, Tram: Ca l’aranyó [T4]