Abstract
In this paper, we extend our framework for constructing low-dimensional dynamical system models of large-scale neuronal networks of mammalian primary visual cortex. Our dimensional reduction procedure consists of performing a suitable linear change of variables and then systematically truncating the new set of equations. The extended framework includes modeling the effect of neglected modes as a stochastic process. By parametrizing and including stochasticity in one of two ways we show that we can improve the systems-level characterization of our dimensionally reduced neuronal network model. We examined orientation selectivity maps calculated from the firing rate distribution of large-scale simulations and stochastic dimensionally reduced models and found that by using stochastic processes to model the neglected modes, we were able to better reproduce the mean and variance of firing rates in the original large-scale simulations while still accurately predicting the orientation preference distribution.
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Acknowledgments
Louis Tao would like to acknowledge the hospitality of the University of Georgia Department of Mathematics and Andrew Sornborger would like to acknowledge the hospitality and support of the Center for Bioinformatics of the College of Life Sciences of Peking University.
This work was supported by NIH NIBIB 005432 (ATS), NIH NINDS 070159 (ATS) and the National Basic Research Program of China (973 Program 2011CB809105) (LT).
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Tao, L., Praissman, J. & Sornborger, A.T. Improved dimensionally-reduced visual cortical network using stochastic noise modeling. J Comput Neurosci 32, 367–376 (2012). https://doi.org/10.1007/s10827-011-0359-3
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DOI: https://doi.org/10.1007/s10827-011-0359-3