Nordita Events [before January 2018]
Neural Firing Correlations in the Neocortex
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Europe/Stockholm
Nordita Seminar Room (SBC seminar room (House 16))
Nordita Seminar Room
SBC seminar room (House 16)
Roslagstullsbacken 35
SE - 106 91 Stockholm
Description
In trying to understand the dynamics of the densely-connected neural networks that comprise the neocortex, a suitable first step is to study the firing statistics of neurons in a simple model of an isolated cortical column: a random network of a few thousand neurons, with any two of them connected with a probability of about 10%.
These neurons fire irregularly, at low rates, and these properties have been thought to be understood, for about a decade now, in terms of a self-consistent balance of excitation and inhibition. However, the existing theory requires correlations between neurons to be very small, in apparent disagreement with the experimentally observed degree of correlation. I will present some results of simulations of such models and some new theoretical ideas for a self-consistent treatment of correlations.
These neurons fire irregularly, at low rates, and these properties have been thought to be understood, for about a decade now, in terms of a self-consistent balance of excitation and inhibition. However, the existing theory requires correlations between neurons to be very small, in apparent disagreement with the experimentally observed degree of correlation. I will present some results of simulations of such models and some new theoretical ideas for a self-consistent treatment of correlations.