This title appears in the Scientific Report :
2016
Please use the identifier:
http://hdl.handle.net/2128/13704 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevE.93.032210 in citations.
Noise-enhanced coupling between two oscillators with long-term plasticity
Noise-enhanced coupling between two oscillators with long-term plasticity
Spike timing-dependent plasticity is a fundamental adaptation mechanism of the nervous system. It induces structural changes of synaptic connectivity by regulation of coupling strengths between individual cells depending on their spiking behavior. As a biophysical process its functioning is constant...
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Personal Name(s): | Lücken, Leonhard (Corresponding author) |
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Popovych, Oleksandr / Tass, Peter A. / Yanchuk, Serhiy | |
Contributing Institute: |
Gehirn & Verhalten; INM-7 |
Published in: | Physical Review E Physical review / E, 93 93 (2016 2016) 3 3, S. 032210 032210 |
Imprint: |
Woodbury, NY
Inst.
2016
2016-03-08 2016-03-01 |
DOI: |
10.1103/PhysRevE.93.032210 |
PubMed ID: |
27078347 |
Document Type: |
Journal Article |
Research Program: |
Addenda Theory, modelling and simulation |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevE.93.032210 in citations.
Spike timing-dependent plasticity is a fundamental adaptation mechanism of the nervous system. It induces structural changes of synaptic connectivity by regulation of coupling strengths between individual cells depending on their spiking behavior. As a biophysical process its functioning is constantly subjected to natural fluctuations. We study theoretically the influence of noise on a microscopic level by considering only two coupled neurons. Adopting a phase description for the neurons we derive a two-dimensional system which describes the averaged dynamics of the coupling strengths. We show that a multistability of several coupling configurations is possible, where some configurations are not found in systems without noise. Intriguingly, it is possible that a strong bidirectional coupling, which is not present in the noise-free situation, can be stabilized by the noise. This means that increased noise, which is normally expected to desynchronize the neurons, can be the reason for an antagonistic response of the system, which organizes itself into a state of stronger coupling and counteracts the impact of noise. This mechanism, as well as a high potential for multistability, is also demonstrated numerically for a coupled pair of Hodgkin-Huxley neurons. |