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The response of cortical neurons to in vivo-like input current: theory and experiment

I. Noisy inputs with stationary statistics

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Abstract

The study of several aspects of the collective dynamics of interacting neurons can be highly simplified if one assumes that the statistics of the synaptic input is the same for a large population of similarly behaving neurons (mean field approach). In particular, under such an assumption, it is possible to determine and study all the equilibrium points of the network dynamics when the neuronal response to noisy, in vivo-like, synaptic currents is known. The response function can be computed analytically for simple integrate-and-fire neuron models and it can be measured directly in experiments in vitro. Here we review theoretical and experimental results about the neural response to noisy inputs with stationary statistics. These response functions are important to characterize the collective neural dynamics that are proposed to be the neural substrate of working memory, decision making and other cognitive functions. Applications to the case of time-varying inputs are reviewed in a companion paper (Giugliano et al. in Biol Cybern, 2008). We conclude that modified integrate-and-fire neuron models are good enough to reproduce faithfully many of the relevant dynamical aspects of the neuronal response measured in experiments on real neurons in vitro.

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Authors and Affiliations

  1. Laboratory of Neuropsychology, National Institute of Mental Health, National Institutes of Health, 49 Convent Dr, Rm 1B80, Bethesda, MD, 20892, USA

    Giancarlo La Camera

  2. Laboratory of Neural Microcircuitry, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

    Michele Giugliano

  3. Theoretical Neurobiology, University of Antwerp, Wilrijk, Belgium

    Michele Giugliano

  4. Institute of Physiology, University of Bern, Bern, Switzerland

    Walter Senn

  5. Center for Theoretical Neuroscience, Columbia University, College of Physicians and Surgeons, New York, NY, USA

    Stefano Fusi

  6. Institute for Neuroinformatics, University of Zurich-ETH, Zurich, Switzerland

    Stefano Fusi

Authors
  1. Giancarlo La Camera
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  2. Michele Giugliano
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  3. Walter Senn
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  4. Stefano Fusi
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Corresponding author

Correspondence to Giancarlo La Camera.

Additional information

G. La Camera is supported by the Intramural Research Program of the National Institute of Mental Health. M. Giugliano is supported by the European Commission (FACETS Project FP6-2004-IST-FETPI-015879, EUSynapse Project LSHM-CT-2005-019055). W. Senn is supported by the Swiss National Science Foundation, grant No. 3152A0-105966. S. Fusi is supported by the Swiss National Science Foundation, grant PP00A-106556. The views expressed in this article do not necessarily represent the views of the NIMH, NIH, or the US Government.

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La Camera, G., Giugliano, M., Senn, W. et al. The response of cortical neurons to in vivo-like input current: theory and experiment. Biol Cybern 99, 279–301 (2008). https://doi.org/10.1007/s00422-008-0272-7

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  • DOI: https://doi.org/10.1007/s00422-008-0272-7

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