Visual physiology of the Layer 4 cortical circuit in silico
Nathan W. Gouwens,
Yazan N. Billeh,
Nuno da Costa,
Saskia de Vries,
Gabriel K. Ocker,
Shawn R Olsen,
R. Clay Reid,
Staci A. Sorensen,
Posted 31 Mar 2018
bioRxiv DOI: 10.1101/292839 (published DOI: 10.1371/journal.pcbi.1006535)
Posted 31 Mar 2018
Despite advances in experimental techniques and accumulation of large datasets concerning the composition and properties of the cortex, quantitative modeling of cortical circuits under in-vivo-like conditions remains challenging. Here we report and publicly release a biophysically detailed circuit model of layer 4 in the mouse primary visual cortex, receiving thalamo-cortical visual inputs. The 45,000-neuron model was subjected to a battery of visual stimuli, and results were compared to published work and new in vivo experiments. Simulations reproduced a variety of observations, including effects of optogenetic perturbations. Critical to the agreement between responses in silico and in vivo were the rules of functional synaptic connectivity between neurons. Interestingly, after extreme simplification the model still performed satisfactorily on many measurements, although quantitative agreement with experiments suffered. These results emphasize the importance of functional rules of cortical wiring and enable a next generation of data-driven models of in vivo neural activity and computations.
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