Biology – Quantitative Biology – Neurons and Cognition
Scientific paper
2005-10-19
Phys. Rev. E 73, 031908 (2006)
Biology
Quantitative Biology
Neurons and Cognition
16 pages, 15eps figures included. To appear in Physical Review E
Scientific paper
10.1103/PhysRevE.73.031908
The information transfer in the thalamus is blocked dynamically during sleep, in conjunction with the occurence of spindle waves. As the theoretical understanding of the mechanism remains incomplete, we analyze two modeling approaches for a recent experiment by Le Masson {\sl et al}. on the thalamocortical loop. In a first step, we use a conductance-based neuron model to reproduce the experiment computationally. In a second step, we model the same system by using an extended Hindmarsh-Rose model, and compare the results with the conductance-based model. In the framework of both models, we investigate the influence of inhibitory feedback on the information transfer in a typical thalamocortical oscillator. We find that our extended Hindmarsh-Rose neuron model, which is computationally less costly and thus siutable for large-scale simulations, reproduces the experiment better than the conductance-based model. Further, in agreement with the experiment of Le Masson {\sl et al}., inhibitory feedback leads to stable self-sustained oscillations which mask the incoming input, and thereby reduce the information transfer significantly.
Claussen Jens Christian
Mayer Joerg
Schuster Heinz Georg
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