Abstract
The maximum entropy method has been successfully employed to explain stationary spiking activity of a neural population by using fewer features than the number of possible activity patterns. Modeling network activity in vivo, however, has been challenging because features such as spike-rates and interactions can change according to sensory stimulation, behavior, or brain state. To capture the time-dependent activity, Shimazaki et al. (PLOS Comp Biol, 2012) previously introduced a state-space framework for the latent dynamics of neural interactions. However, the exact method suffers from computational cost; therefore its application was limited to only \({\sim }15\) neurons. Here we introduce the pseudolikelihood method combined with the TAP or Bethe approximation to the state-space model, and make it possible to estimate dynamic pairwise interactions of up to 30 neurons. These analytic approximations allow analyses of time-varying activity of larger networks in relation to stimuli or behavior.
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Acknowledgments
CD acknowledges T. Toyoizumi for hosting his stay in RIKEN Brain Science Institute and K. Obermayer for valuable ideas and discussions. The custom-made Python programs were developed based on the code originally written by T. Sharp. CD was supported by the Deutsche Forschungsgemeinschaft GRK1589/2.
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Donner, C., Shimazaki, H. (2016). Approximate Inference Method for Dynamic Interactions in Larger Neural Populations. In: Hirose, A., Ozawa, S., Doya, K., Ikeda, K., Lee, M., Liu, D. (eds) Neural Information Processing. ICONIP 2016. Lecture Notes in Computer Science(), vol 9949. Springer, Cham. https://doi.org/10.1007/978-3-319-46675-0_12
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DOI: https://doi.org/10.1007/978-3-319-46675-0_12
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