Abstract
This paper presents a synergistic parametric and non-parametric modeling study of short-term plasticity (STP) in the Schaffer collateral to hippocampal CA1 pyramidal neuron (SC) synapse. Parametric models in the form of sets of differential and algebraic equations have been proposed on the basis of the current understanding of biological mechanisms active within the system. Non-parametric Poisson–Volterra models are obtained herein from broadband experimental input–output data. The non-parametric model is shown to provide better prediction of the experimental output than a parametric model with a single set of facilitation/depression (FD) process. The parametric model is then validated in terms of its input–output transformational properties using the non-parametric model since the latter constitutes a canonical and more complete representation of the synaptic nonlinear dynamics. Furthermore, discrepancies between the experimentally-derived non-parametric model and the equivalent non-parametric model of the parametric model suggest the presence of multiple FD processes in the SC synapses. Inclusion of an additional set of FD process in the parametric model makes it replicate better the characteristics of the experimentally-derived non-parametric model. This improved parametric model in turn provides the requisite biological interpretability that the non-parametric model lacks.
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Acknowledgments
This research was supported by the NSF ERC (BMES), DARPA (HAND), ONR, NSF (BITS), and NIH/NIBIB (BMSR). We thank the two anonymous reviewers for their insightful comments on this manuscript.
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Song, D., Wang, Z., Marmarelis, V.Z. et al. Parametric and non-parametric modeling of short-term synaptic plasticity. Part II: Experimental study. J Comput Neurosci 26, 21–37 (2009). https://doi.org/10.1007/s10827-008-0098-2
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DOI: https://doi.org/10.1007/s10827-008-0098-2