Abstract
A wide range of evidence has shown that information encoding performed by the visual cortex involves complex activities of neuronal populations. However, the effects of the neuronal connectivity structure on the population’s encoding performance remain poorly understood. In this paper, a small-world-based population encoding model of the primary visual cortex (V1) is established on the basis of the generalized linear model (GLM) to describe the computation of the neuronal population. The model mainly consists of three sets of filters, including a spatiotemporal stimulus filter, a post-spike history filter, and a set of coupled filters with the coupling neurons organizing as a small-world network. The parameters of the model were fitted with neuronal data of the rat V1 recorded with a micro-electrode array. Compared to the traditional GLM, without considering the small-world structure of the neuronal population, the proposed model was proved to produce more accurate spiking response to grating stimuli and enhance the capability of the neuronal population to carry information. The comparison results proved the validity of the proposed model and further suggest the role of small-world structure in the encoding performance of local populations in V1, which provides new insights for understanding encoding mechanisms of a small scale population in visual system.
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Acknowledgments
This study was supported by a Grant (U1304602) from the National Natural Science Foundation of China and a Grant (122102210102) from the key scientific and technological project of Henan province.
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Shi, L., Niu, X., Wan, H. et al. A small-world-based population encoding model of the primary visual cortex. Biol Cybern 109, 377–388 (2015). https://doi.org/10.1007/s00422-015-0649-3
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DOI: https://doi.org/10.1007/s00422-015-0649-3